Ukrainian Journal of Forest and Wood Science
ISSN 2664-4460 (Online), ISSN 2664-4452 (Print) Scientific Herald of NULES of Ukraine. Series: Forestry and Decorative Gardening → Scientific journal «Ukrainian Journal of Forest and Wood Science» Subject: Forest policy and taxation; forestry; silviculture and biotechnology, forest reclamation; technology of wood processing; landscape architecture and ornamental horticulture, forest botany and geobotany Year established: 2010 Founders: National University of Life and Environmental Sciences of Ukraine Published 4 times per year. Languages of the publication: Ukrainian, English. Address: Heroyiv Oborony st., 15, Kyiv-03041, Ukraine. Phone: +38 044 527 87 20 Indexed in the following international scientometric databases: The main purpose of the journal is the promotion of forestry and decorative gardening. Its main purpose is publishing articles of problem-techniques in production, synthesis and methodical, which highlights research results with statistical data with theoretical and practical significance relevant to agriculture and not previously published.
Національний університет біоресурсів і природокористування України
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Оптимізація режимів термічного оброблення деривини граба
Наведено огляд технологій виготовлення термомодифікованої деревини та проаналізовано результати досліджень впливу температури, тривалості і умов термооброблення деревини різних порід деревини. Наведено режими термічного модифікування деревини граба, методику досліджень властивостей деревини і результати регресійного аналізу експериментальних досліджень з визначення деяких фізико-механічних властивостей термічно модифікованої деревини граба та визначені оптимальні параметри режиму її термічного оброблення.
Copyright (c) 2018 Scientific Herald of NULES of Ukraine. Series: Forestry and decorative gardening
Influence of rutin-ammonium complex on the physiological condition of pine seedlings
In the plant body, phenolic compounds nonspecifically affect the processes of morphogenesis and perform a wide range of regulatory and protective functions. Of particular interest are the processes involved in the complexation of flavonoids as a result of their interaction with ammonium forms of nitrogen. Polar compounds, which are formed in tissues as a result of chemical transformation, are quite mobile in soil solutions and show high biological activity. The properties of phenol-ammonium complexes are of considerable interest in terms of morphogenesis, physiology of stability, as well as in the system of interaction of plants with soil microorganisms. Studies of the effect of phenol-ammonium complex were performed on seeds and seedlings of Scots pine. Quantitative indicators of germination energy and germination were determined by seed germination. Biochemical profiling of seedling tissue extracts was performed by high-performance thin layer chromatography. It has been experimentally confirmed that rutin (quercetin-3-O-rutinoside) after interaction with 10% aqueous ammonia solution forms a complex of substances, among which the chromatography revealed polar products that potentially affect the regulation of growth. At a total concentration of 15 mg / l, these substances significantly increased germination energy and seed germination. In pine seedlings, they stimulated the growth of roots and shoots. The effect of the complex of organic compounds on seedlings depended on the concentration, duration of seed treatment and had a prolonged effect. The obtained phenol-ammonium complex at a concentration of 10-15 mg/l contributed to an increase in the amount of chlorophylls, carotenoids in the tissues of seedlings, and at 20-40 mg/l increased the content of phenolic synthesis products.
Copyright (c) 2021 Ukrainian Journal of Forest and Wood Science
Red flower apple in the collection of the National University of Life and Environmental Sciences of Ukraine
Apple trees with red flowers are especially attractive during the flowering period, making ones a desirable component of ornamental plantings. 30 samples of apple trees with anthocyanin organ coloring in the collection of Scientific Laboratory "Genetic resources, introduction, and breeding of unusual fruit and ornamental crops", located in Agronomic Research Station of the National University of Life and Environmental Sciences of Ukraine have been studied. In 2001 phenological observations during blooming and morphometric analysis of flowers and leaves were carried out, also decorativeness was evaluated. The dominant gene that controls the anthocyanin pigmentation of organs in the apple tree comes from Malus niedzwetzkyana. Now the rank of this taxon is reduced to a variety – M. domestica var. niedzwetzkyana. Niedzvetzky`s apple was involved in crossing with small-fruited apple species to develop ornamental hybrids, some of which received nothospecies names, and in the breeding of fruit varieties and rootstocks of M. domestica. According to the International Code of Nomenclature for Cultivated Plants, varieties with anthocyanin-colored petals having in the pedigree M. domestica var. niedzwetzkyana can be distinguished as Malus Niedzwetzkyana Group. If the Malus Niedzwetzkyana Group is supplemented with varieties with anthocyanin color of petals that originate from other species of apple trees, e.g., M. halliana and M. spectabilis, then the expanded Group can be called Malus Purpurea Group. At the same time, some varieties may belong to other Groups, in particular, Malus Pendula Group, Malus Redflesh Group, etc. The highest decorativeness (5 points) during blooming is inherent for the samples Nos. 2332 'Makamik', 2947, 3100 'Aldenhamensis', 3157 'Pionerka', 3305, 3382, 3540, 3592, 3601, 3603, 3656, 3691, 3692, 4292 and hybrids '17-279', '17-316', '18-275', '18-293', '18-325'. The samples No. 1723 'Lawn Krasnolepestnaya', 3314 'Royalty', 3375 'Black Pearl' are slightly inferior to them in decorativeness, but they have a special habitus or intense anthocyanin color of the leaves, which gives them certain advantages. The use of these samples allows you to establish a conveyor of elongated flowering of red-flowered apple trees at green construction sites.
Primary morphogenesis of Sorbus Torminalis L. (Grantz) into in vitro culture
Nowadays in vitro methods, combined with ex situ and becoming an increasingly important means of preserving and maintaining the level of phytodiversity stability. Sorbus torminalis L. is a tree of the Rosaceae family, which grows on the territory of Ukraine, belongs to rare, valuable aboriginal species and is listed in the Red Book of Ukraine, with its protection status - endangered. The peculiarities of introduction of in vitro culture of perennial representatives of S. torminalis with the use of different types of explants, sterilizing substances, cultivation conditions and nutrient medium composition are presented in the paper. For in vitro culture of S. torminalis, annual shoots with apical and lateral buds 15-25 cm long are optimal. The influence of different sterilization options on the development of primary microshoots has been studied. For sterilization of artificially awakened and young shoots it is most effective to use 0.1% solution of AgNO3 (7 min) and 15% solution of H2O2 (10 min). The developed method of sterilization of S. torminalis explants provided 80-90% yield of aseptic plant material. It was found that the sterilization regime did not significantly affect the primary morphogenesis of explants and was uniform. The optimal components of nutrient media at the stage of introduction into vitro culture and primary morphogenesis of S. torminalis have been established. For the cultivation of different types of explants of S. torminalis, used WPM nutrient media with the addition of synthetic plant growth regulators 6-benzylaminopurine, thidiazuron, kinetin 0,5-1,5 mg mg∙l-1 and α-naphthylacetic acid 0,01-0,05 mg∙l-1 both alone and in combination with each other. In particular, for the regeneration of plants from the lateral and apical buds of explants is effective WPM medium with the addition of BAP 1,5 mg∙l-1 + 0,5 mg∙l-1 NAA and WPM + TDZ medium 0,5 mg∙l-1 with adding PVP 200 mg∙l-1. To induce the laying of additional buds and shoots on the explant from the apical meristems in the medium should be added 4,0 mg∙l-1 BAP + 0,01 mg∙l-1 NAA with the addition of PVP 200 mg∙l-1.
Establishment of the regularities of the polymer cover influence on the wood bio destruction
The process of wood biological destruction is analyzed. It was found that the neglect of environmentally friendly means of bioprotection, leads to the destruction of wooden structures under the action of microorganisms. It is established that the study of wood protection conditions leads to the creation of new types of protective materials that reduce water absorption, as well as reduce the amount of substances that are the environment for the development of wood-destroying fungi. In this regard, a computational and experimental method for determining the proportion of destroyed material under the action of microorganisms using an antiseptic has been developed. The analysis of the results shows that the maximum weight loss in the case of biodegradation of untreated wood samples ranged from 7,6 to 16 %, and the weight loss of thermally modified wood samples did not exceed 3 %, antiseptic-hydrophobicizer – was less than 2 %. It was found that the protection when treated with thermally modified wood with oil-wax and azure exceeds (compared to untreated) more than 4 times in terms of biodegradation, and treatment with antiseptic-water repellent for untreated oil-wax and azure – more than 8 times. It should be noted that the presence of oil-wax and azure leads to blockage of the wood surface from the penetration of moisture or microorganisms. Therefore, the intensity of wood-destroying fungus development on the surface of various samples are differed. Obviously, such a mechanism of the protective coating influence is the factor regulating the process, which preserves the integrity of the object. On the experimental data basis and by modeling the equations, the microorganisms population dynamics in the volume of material and the function of increasing the number of dead organisms are derived. Thus, a polymer shell was created on the surface of the sample, which significantly reduced the penetration of microorganisms into the wood, and the weight loss of wood during biodegradation did not exceed 2,5 %. Additional application of protective substances on the surface increases the protection level of untreated pine wood by 72 %, thermomodified at 190 °C – 25 %, at 220 °C – by 37 %. Similar results for hornbeam wood – 60; 37 and 28 %, for oak – 50; 37 and 37 % respectively.
WOOD PROCESSING AND FURNITURE TECHNOLOGIES
Geoplastics of relief as a means of forming the perception of landscape compositions on the example of the Pechersk landscape park in Kyiv
Geoplastics, as a method of vertical planning, is gaining more and more popularity among landscape architects, because this method gives the landscape an aesthetic unity, expressiveness, and a peculiar feature. The paper considers the influence of geo-plastic changes in the relief on a person, the viewer's perception of the environment. These factors are extremely important in the creation and design of the park, they allow the key elements to be presented, while creating harmonious combinations in the space, it is admirable and it is this that encourages you to visit the landscape object. Pechersk Landscape Park is located on the picturesque slopes of the Dnieper in Kiev, has a landscape type of planning, which is characterized by large areas of lawns with groups of shrubs and trees, the lack of symmetry in the placement of alleys and other elements of free planning. The park zone itself covers an area of 32,92 hectares. Location in difficult terrain contributes to the use of geo-plastic tools, which can be used to improve and develop park space. The illuminated research is based on the analogy method, by means of which the analog elements of geoplastics are transferred to the results obtained during the field survey of the park territory on difficult terrain. Graphic materials were developed using the ArchiCad 21 software package based on the original cartographic data. A detailed analysis of the problematic aspects of the Pechersky Landscape Park identified the main tasks: adaptability to the needs of society, increasing the comfort of stay, improving the natural landscape, arranging natural zones of park relief. Techniques and methods for improving the territory were applied, such as terracing slopes, creating eco-chairs, using artificial relief in playgrounds. The impact of these changes on the stay of visitors and on the environment as a whole is summarized and predicted. The use of geoplastics in the context of the perception of landscape compositions will contribute to solving problematic relief and exposition aspects of the Pechersk Landscape Park, which will increase its recreational potential.
Features of formation of parks-monuments of lanscape art of the second half of the XX century of Ukrainian Polissіa
The formation of park-monuments of landscape art was analyzed from a historical perspective. In the second half of the twentieth century, two national and nine local park-monuments of landscape art were created in Ukrainian Polissya. The purpose of PMLA is the protection and the preservation of the most prominent and valuable examples of park construction in order to use them for aesthetic, educational, scientific, environmental and health purposes. By the placement in the planning structure of inhabited localities are defined city, village and district parks. The motivation for the creation of parks was the preservation, reproduction and enrichment of tree diversity in the conditions of the Ukrainian Polissya. In the parks were planted technical, fast-growing, rare species, and species of woody plants valuable for forestry and landscape gardening with their subsequent use for scientific and economic purposes. Some of the plantations in the parks were memorable, anniversary, or dedicated to significant events (the anniversary of the October Revolution and the birthday of V.I. Lenin). In Ukrainian Polissya, there are three parks created on the basis of existing oak plantations («Klevanskyi Park», «Park Antonivka», «Bondaretskyi»); one - on the basis of man-made plantations with Acer platanoides L., Carpinus betulus L., Fraxinus excelsior L., Tilia cordata Mill. («Ovrutskyi»); three parks of culture and recreation («Horodnianskyi», «Vysokivskyi», «Slovianskyi») including a meadow park («Slovianskyi»), a children's park («Bondaretskyi»), three arboretums («Dubechnenskyi», «Bairak», «Novostavskyi dendropark», «Zhornivskyi»), which were transformed over time, or which were granted the status of PMLA. By the size, PMLA were small, medium, and large with star, axial, fan, loop, cross-shaped and combined planning structures. In four PMLA, there were man-made and natural reservoirs, and a fountain. Five parks were combined (memorial and park of culture and rest); there were concentrated memorial complexes, monuments, and an obelisk. Plantings of parks are represented by groups, solitairs, alleys, ordinary plantings, hedges, and sometimes by groves and massifs. On the territory of 11 PMLA grew 178 species of woody plants, with 121 of them being included to the IUCN Red List. In 4 parks, since their creation the number of species increased by 75–129%; in 6 parks tree diversity decreased, with 29 to 87% of tree plant species remaining, among them 66–94% of trees were rare. 11 PMLA are valuable centers of tree diversity and unique plantings of Ukrainian Polissya; and an example of the formation of didactic, ethnographic, memorial, children's, culture and recreation, and combined parks that need further protection and expansion of the area and collection. Some parks are in need of planting reconstruction.
Structural peculiarities of forest litter in water protective pine stands in wet sites of Zhytomyr Polissia
The results of the study of the fractional composition, structure and formation of forest litter in water protection pine plantations, which grow in the predominant moist forest vegetation conditions of Zhytomyr Polissia, are presented. The age range of stands varies between 18 and 85 years. It is established that water-protected pine stands in wet hygrotopes accumulate significant reserves of forest litter, which ranges from 33.0 t/ha in young plantations 77.0 t/ha in mature stands. The distribution of forest litter throughout area in most stands is uniform, although in young plantations its greater share is accumulated between rows. In terms of composition, the forest litter of pure pines is characterized by a medium dense structure, and in pines with an admixture of deciduous species, the litter is usually loose, due to the presence of annual fallen leaves in its upper horizon. The thickness of forest litter between rows of young plantations varies within and 2.6-2.9 cm without its clear distribution on the horizons. In medieval plantations, the horizons of the litter are already clearly distinguished. The total thickness of the litter is 4.0–4.3 cm. In the pre mature and mature pine stands the thickness of the forest litter profile varies between 6.0–6.3 cm. In the stands of older age groups the forest litter has mainly a three-layer structure. The trend of intensive accumulation of forest litter in the conditions of wet boreal and sub boreal conditions with the age of maturity is revealed. In pre mature plantations, the accumulation of litter slows down and in mature plantations; the processes of accumulation and decomposition of litter are leveled. The tendency of predominance of the active part and, accordingly, reduction of the inactive fraction of litter in the pre mature and mature plantations of wet sub boreal site compared to boreal conditions is indicated, which indicates more active processes of mineralization of litter in wet subboreal conditions.
Practical approaches to determining the dynamics of the stability of stands of breeding objects
Introduction.The article analyzes the indicators that can be used to assess the biotic and ecological stability of forest stands. For breeding facilities, this issue is of relevance when prescribing reforestation measures in forest genetic reserves, assessing the stability when selecting plus stands, assessing selected permanent forest-seed plots to determine the volumes of their formation and tending activities in them and, in the future, their transfer to plus stands, as well as, in general, for isolation of a reserve fund from the forest environment. Materials and Methods. The methods for assessing the stability of forest stands are based on determining the indicators of forest stand stability, calculated on the basis of tree mensuration in the study area (based on a trial plot) and the sanitary state of the trees. The basis for the determination is the complete tree enumeration and the scale of sanitary state used in production operations (SanitaryForestsReg.Ukraine). The assessment of stand stability is based on the method of calculating the loss of stability (BC)), which was proposed to determine the stability of secondary spruce forests in fertile beech forest types (BlystivV. I. 2006) and later adapted to assess the formation of the stability of hornbeam-beech stands (BlystivV. I., 2012). The issue of assessing the tension of a stand, using the growing space of the forest is addressed in the methods section of the dissertation work by V.M.Malyuga, 2020. Results.Using the values of the above indicators (KC, ВбС, ВеС), stands can be divided into 3 categories of stability: stable, conditionally stable and unstable. Appropriate forestry activities are proposed according to the categories. They require a special numeric-expressed substantiation, both in relation to the economic group of forest types, forest category, and for targeted activities or research areas - in this case, loss of stability of breeding facilities. Tension studies have shown that by using factors of environmental impact, the conditions are assessed as normal, non-tensioned and tensioned. To assess the indicator values of normal and weakened states, the basic scale of the assessment of biotic stability by stand indexes will be used. For the weakened state, three indexes are identified for the purpose of detailed planning of possible activities. Conclusions. In forest breeding, the selection and formation of forest stands for stability will require parameter-defined indicators, in this case, the forest stand stability coefficient is used. The protective properties of the forest environment, identified with the preservation of genetic diversity, determined by the amount and quality of natural regeneration and associated with ecological stability, can be effectively assessed by its loss according to the above method. The studies on the stand tension, using the factors of environmental impact, have shown that stands growing under tension are those that are somewhat overstocked ones. Pine stands grow optimally when they have a density range of 0.7-1.0. The rest of the stands grow without tension, but they do not make full use of growing space due to varying degrees of stand density. Such medium-stocked stands can be effectively used as selected and appropriately formed permanent forest-seed plots. Assessment of the stand state by impact factors makes it possible to record quantitative changes. The dynamics of areas in accordance with the changes of these indicators by periods characterizes the ecosystem changes (stages of development by successive process) and is important for the facilities of preservation of genetic diversity - especially forest genetic reserves.
Impact of climate change on scots pine plantations: state, problems, challenges
It is proved that since the beginning of the XIX century. the degradation of pine stands is enormous on all continents. In Ukraine, according to the Ministry of Environmental Protection and Natural Resources of Ukraine, the average annual temperature since the beginning of the 20th century has increased by more than 2 °C, including 1.2 °C over the past 30 years. In recent years, the number of days with maximum summer temperatures above 35 °C and 40 °C has almost doubled in extreme weather. In most of the territory of Ukraine, there is already a tendency towards an increase in drought, increased fire hazard, recurrence of years during which plantations will experience water stress, damage by pests, as well as degradation of forest ecosystems as a whole as a result of an increase in forest areas. number and duration of hot periods. It was found that dendrochronological methods are used to study the relationship between climate change and pine radial increment. The main methods for studying radial increment are taking cores at a height of 1.3 meters from two opposite radii in order to prevent the influence of random factors on radial increment. The annual ring width is determined using dendrochronological instruments with automatic data recording. The data on the values of annual rings are processed according to the programs of the International Tree Ring Data Bank (ITRDB). To synchronize the series with the establishment of the calendar year for the formation of each annual increment, the specialized COFECHA program is used. It has been established that the growth of scots pine is limited by the humidification of the climate and the presence of sufficient moisture in the soil, however, in the presence of extreme temperatures, the negative tendency towards drying out of plantations persists.
Optimization of explants in vitro sterilization protocol of some deciduous tree species
One of the methods of obtaining planting material of deciduous plants, in particular common ash (Fraxinus excelsior L.), broad-leaved linden (Tilia platyphyllos Scop.) and silver birch (Betula pendula Roth) is microclonal propagation. Asepticity of explants is a prerequisite for microclonal plant propagation. Chemical sterilization with liquid substances is mostly used for this purpose. The mode of decontamination is influenced by a number of factors, in particular the genotype of the plant. The purpose of the study was to optimize the sterilization protocol of F. excelsior, T. platyphyllos and B. pendula explants for microclonal propagation. For research, 20–30 cm of shoots isolated from 12-year-old T. platyphyllos, 10-year-old B. pendula, and 15-year-old F. excelsior in February-March 2021 were used. Plant material was cultured according to conventional methods on a nutrient medium MS (Murashige & Skoog, 1962). Biotechnological methods were used (plant tissue culture in vitro, microclonal propagation). MS Excel software package was used to process the experimental data, the mean and its standard error were calculated. One-way analysis of variance (ANOVA) was performed to analyze the effect of explant sterilization on asepsis. The expediency of keeping plant material during the day in 0.1 % solution of «Samshit» - F. excelsior and 0.3 % solution «Fundazole» - T. platyphyllos and B. pendula is shown. The sterilization protocol of experimental plants (efficiency over 50 %) was optimized by using a stepwise method using 70 % ethyl alcohol, 1.0 % and 2.0 % AgNO3 and 2.5 % and 5.0 % NaClO. The effect of the sterilization regime of experimental plants on asepsis is statistically significant at the level of 5%. To initiate the explants, a culture medium according to the MS prescription was used with the addition of 0.25 mg/L kinetin and 2.0 g/L activated carbon. Further studies are aimed at developing a protocol for direct regeneration of microshoots of F. excelsior, T. platyphyllos and B. pendula under the action of components of the culture medium in vitro. Keywords: in vitro plant tissue culture, Fraxinus excelsior L., Tilia platyphyllos Scop., Betula pendula Roth, sterilization, explants, regenerative ability, culture medium, microclonal propagation.
Structure and morphogenesis of shoots of species of the genus Viburnum L. in the Right-Bank Forest-Steppe of Ukraine
The research was conducted on the structure and characteristics of the growth of shoots of the genus Viburnum L. There are significant differences in the structure and dynamics of growth within the genus, so the determination of the structural features of the shoots of species of the genus Viburnum is relevant. The research of the dynamics of shoot growth was carried out according to the method of A.A. Molchanov and V.V. Smirnov (1967). The species studied by us belong to three sections of the genus Viburnum; the peculiarities of buds structure generally determine the structure of the shoots in the species of each section. It was found that the type of each of the three sections of the genus is characterized by a special structure of the shoots. It has been studied the rhythm of growth and development of native and introduced species of the genus Viburnum L. The terms of shoots growth of the species of the genus were analyzed, and the length of the annual growth of shoots was determined. Phenological date of the beginning and end of shoot growth was established. It was revealed that the onset of individual phenophases quite clearly correlates with the sum of effective temperatures above 5 ° C. The species of the genus Viburnum are characterized by the following types of shoots: tillering, stem, generative. Intensive growth of shoots of all studied species occurs in May - mid-June. In the species of the section Lantana, there are 2 peaks of shoot growth - May and mid-July. According to the duration of growth of shoots, viburnum can be divided into two groups: 1) with a short period of growth (65 - 75 days): V.opulus L., V.sargentii Koehne, V.prunifolium L., V.rufidulum Raf., V.lentago L; 2) with a long period of growth (100 or more days): V.lantana L., V.carlesii Hemsl., V.veitchii C.H. Wright, V.rhytidophyllum Hemsl., V.buddleifolium C.H. Wright, V.burejaeticum Rgl. et Herd. The data obtained demonstrated that the greatest annual growth of all Viburnum species was recorded at the age of 4-7 years. A decrease in the annual growth of axial shoots states the need for works on preliminary rejuvenation of the bush. Key words: shoots, annual growth, phenophase, phenological date, Viburnum.
Organic carbon in vegetal biomass of forests in Kyiv region
Carbon sequestrative capacity of forest plant communities is one of the main criteria for the potential for low-carbon development of the country and the fulfillment of international obligations in the context of the Paris climate agreement. The information basis of the research is formed by information from the database of IA "Ukrderzhlisproekt", which contains the detailed biometric characteristics of forest stands located in the research region. Another component is represented by a system of mathematical models for quantitative assessment of live biomass and forest dead organic matter. As a result, in this research we have determined the quantitative values of organic carbon content in live biomass and dead organic matter of forests of Kyiv region. In total, the amount of carbon accumulated in vegetal biomass of the region's forests equals 61.8 million tons, of which 60 % is accounted for by pine stands. The share of carbon accumulated in dead organic matter is 10.5 %. The highest density of sequestered carbon per unit area is typical for ash and oak stands with indicators of 10.08 and 9.921 kg∙(m2)-1, respectively. More than 40 % of organic carbon is accumulated in vegetal biomass of stands of I site index class, which mainly grow in relatively poor forest conditions. Recreational, health-improving and protective forests of the region are characterized by the highest indicators of organic carbon density per unit area – 10.53 and 10.49 kg∙(m2)-1, respectively. Among the objects of the nature reserve fund, the dominant positions in the volume of the studied indicator belong to nature reserves – 82.7 %, national nature parks account for another 8 %. In the total structure of carbon capacity of dead organic matter (6.5 million tons) more than 60% belongs to forest litter. At the same time, carbon content in dead organic matter of coniferous stands equals 4.1 million tons, or 62.9 %. The results of the research will serve as an information basis for the formation of a strategy for regional low-carbon development. Keywords: biomass, carbon, sequestration, environmental monitoring, dead organic matter, stand, live biomass.
FOREST ECOLOGY AND ENVIRONMENT PROTECTION
Theater and amphitheater as structural elements of parks, gardens, garden and park ensembles of the 17th-20th centuries
Theater as a place for spectacles is a form of social consciousness, a means of ideological and aesthetic education of the population. Theater reflects the peculiarities of the development of society and is related to its culture. The desire in different periods to harmoniously combine nature and culture, green theaters, and other green scenes has always reflected the tastes and fashions of a certain era. The history of the development of garden theaters in the European countries, including Ukraine, is considered. The types of theaters on the territory of historical gardens, parks, estates, palace and park complexes, and garden and park ensembles of Europe and North America of the XVII-XX centuries are studied. The history and evolution of the development of the main types of theater buildings are characterized and their differences are given. The preconditions for the emergence and popularization of open-air theaters have been clarified. The terms - garden, green, air, summer theaters - are analyzed and generalized. Based on the research, the classification and definition of a garden theater (amphitheater) are proposed. Garden theaters are types and varieties of theaters (forest, landscape, green, air, water, summer, stone, mechanical, palace) and amphitheaters (stone, lawn), located on the territory of gardens, parks, garden and park ensembles. They can be open-air (temporary), closed (permanent), combined (cooperation of temporary and permanent theaters). On the territory of gardens, parks, garden and park ensembles, several types or varieties of theaters or a theater and an amphitheater can be located, the amphitheater can be part of a theater. A comparative analysis of green, water theaters and other theaters is given. The characteristic features of the location of theaters in the planning structure of the studied objects, including elements of topiary art and an assortment of plants for green, water, air, and summer theaters, are revealed. Keywords: water, green, garden, open-air, summer, air, theater.
Assessment of the national significance «Skala-Podilsky park» park-memories and landscaping art green plantations conditions
Green plantations of ancient park not just only an important ecological component of human habitat, but also a cultural and historical factor of national identity. The history of Ternopil landscape art demonstrates the close links of Ukrainian culture with Polish, Lithuanian and Western European. Galicia is rich in architectural monuments of the past: fortresses, castles, defensive ramparts, courtyards, fortifications, fortified monasteries and temples, estates and manors of the local nobility. Decorative parks, orchards, and collections of medicinal plants were established near such buildings. Most of the ancient parks have undergone significant negative changes due to turbulent historical events in the twentieth century. But some objects, although in a state of disrepair, have been preserved and need to be restored and maintained. Skala-Podilsky Park, a monument of landscape art of national importance, was founded at the end of the 18th century. In the future, this park was repeatedly reconstructed. During that time, many ornamental, fruit, berry trees and shrubs, including exotic ones, have been acclimatized here. During the period of Ukraine's independence, proper care of plantations was not carried out. Such way brings the destruction of the park's infrastructure and a reduction in the number of valuable taxes. A tax inventory of dendroflora was carried out to organize the territory and reconstruct the park-monument. The vital and phytosanitary condition of trees and bushes was determined there according to the Alekseev scale. 63 species of trees, bushes and vines were found during this research. It is established that the general indicator of relative living condition of park plantings makes 57,7% and corresponds to a category "weakened". According to the phytosanitary condition of trees and shrubs, 41% belong to the category of "satisfactory", 34% - "good", 25% - "unsatisfactory". Thus, a quarter of the registered trees need to be rehabilitated or removed from the stand. The received materials testify to the need to conduct counting and inventory of all ancient parks of Ukraine and to develop a system of their geoinformation monitoring in order to streamline revitalization. Keywords: dendroflora inventory, phytolandscape, sanitary condition of trees, rare trees.
Social and environmental consequences of catastrophic forest fires in Ukraine
Recent studies show an increase in the number and frequency of catastrophic forest fires in the world since the end of the XX century. Such forest fires often will cause essential economic and environmental losses, human casualties. According to forecasts, in Ukraine due to climate change fire weather danger will steadily grow: temperatures rising, changing seasons duration, prolongation of the vegetative and fire season, increasing the frequency and intensity of heat waves and natural hydrometeorological phenomenon, change of local water patterns. Several catastrophic fires in the natural landscapes of Ukraine occurred in 2020 in different regions of the country. Wildfires in Zhytomyr, Luhansk, Kharkiv and Kyiv regions were the largest and most catastrophic in Ukrainian history, with human casualties, large economic losses, environmental and social negative consequences. The main parameters of such catastrophic fires weather conditions, long period without precipitation, high air temperature and wind gusts of 15-25 m/s. There are two main critical periods in Ukraine, in terms of frequency and risk of forest fires. The first, spring, from the melting snow to the regeneration of a new green cover. The second period lasts from the last month of summer into the autumn rainy season when agricultural vegetation dries up and people and farmers use fires for remnants of vegetation clearing in the fields. The catastrophic landscape fires of 2020 indicate the gaps of the current fire management system on natural and cultural landscapes in Ukraine to effectively respond to large fires. The current system needs enhancement in accordance with new conditions and challenges. The manuscript presented information about catastrophic fires that occurred in the natural landscapes of Ukraine in 2020 based on available official information, remote sensing data and data from the geoportal "Landscape Fires of Ukraine" (wildfires.org.ua). Also in the article, performed the analysis of the components of the current fire management system and the main shortcomings and key recommendations for its improvement are formulated. Keywords: forest fires, emergencies, weather conditions, climate change, damage, human casualties.
Modeling structure of Scots pine stems volume by grade categories using stochastic process
The study highlights methodological aspects of predicting stem volume of merchantable Scots pine trees by grade categories using distribution models of different quality zones along stems. The study is based on empirical data collected in the mature stand during clear-cut harvesting. In total it includes measurements of 245 tree stems for which sequence and lengths of different quality categories were evaluated. A semi-Markov model was applied to characterize a random process of height-relevant co-occurrence and length of merchantable wood, firewood, and residues. The model was determined by the following parameters: 1) input occurrence probabilities of specific grade category in the butt section of tree stems (initial state of the system); 2) distribution matrix of grade categories by lengths; 3) matrix with transition probabilities between grade classes on different stem heights. In this study, we considered the process in which the initial state of the system was associated with merchantable wood which was true for most pine stems. We used beta-function to model lengths of grade categories which parameters were fitted using relative stems height. We also used empirical data to calculate probabilities of transition between merchantable wood, firewood, and residuals along pine stems. The analysis indicates that the length distribution of merchantable wood and firewood depends on the relative height where the grade is observed, and total tree stem height. Thus, we identified four zones where the function of beta-distribution was used to model lengths of each grade category with customized parameters depending on the relative height of their location on tree stem. As a result, we developed a methodology that can be used to simulate datasets with tree stem characteristics, and further to predict the distribution of volume by grade categories depending on their diameters, heights, and merchantability. It is worth noting that our study is focused merely on merchantable pine stems, and one should expect another relationship for stems of different tree species as well as for merchantable pulpwood trees. Given the new standard for merchantable wood classification adopted in Ukraine, the developed methodology is suitable for updating existing tables of distribution of tree stem volumes by wood grade categories. Keywords. Merchantable wood, distribution function, semi-Markov probability model, volume tables.
Myco- and microorganisms in the tuberculosis pathology of the common ash in Ukraine and interaction between them
Attention is focused on the fact that in recent years there has been epiphytotic dieback out of many species of forest woody plants both in Ukraine and in other countries of the world, which has a dynamic character and a tendency to grow. In the deep pathology of this phenomenon, phytopathogenic bacteria, which have high reproduction energy and can penetrate the plant both from the outside and cause a pathological process as vital obligates, were left without attention. It has been established that the most common and harmful disease of common ash in Ukraine is tuberculosis. The causative agent of the disease is the phytopathogenic bacterium Pseudomonas syringae pv. savastanoi Gard. affects both trunks, branches and shoots, and inflorescences of common ash. Bacteria Pseudomonas sp., Pseudomonas fluorescens Mig., Pseudomonas syringae Van., Erwinia herbicola Eh., Xanthomonas sp. were isolated from tuberculous pathology as a concomitant myco- and microbiota and micromycetes Cladosporium cladosporiodes Fres., Ulocladium botrytis Preus., Mycelia sterilia (dark), Mycelia sterilia (orange), Fusarium heterosporum Lin., Fusarium sp., W., Cylindrocarpon didymium Har., etc. The mechanism of systemic relationships of the components of myco- and microbiota of tuberculous pathology of common ash in the regulation (self-regulation) of pathogenicity and aggressiveness of vital obligates has been investigated. Attention is focused on the prospects and expediency of using the antagonistic properties of myco- and microorganisms and biological products based on them for the prevention and protection of tree plantations from bacterial pathogens. It is shown that the pathology of common ash is a multifaceted phenomenon with interrelated processes of an infectious and non-infectious nature. The need to distinguish between the etiology and pathogenesis of this negative phenomenon is indicated, that is, not to mix the factors that lead to the weakening of ordinary ash (factors catalyzing the disease) and the factors that cause its epiphytotic dieback. Keywords: bacteria, fungi, common ash, antagonism, Pseudomonas syringae pv. savastanoi.
Copyright (c) 2021 Scientific Journal «Ukrainian Journal of Forest and Wood Science»
Preservation of representatives the genus Drosera L. using biotechnological methods
The peculiarities of obtaining planting material of rare representatives Drosera spatulate L. and Drosera aliciae L. using microclonal propagation in order to preserve and cultivate them in ex vitro conditions were studied. The method of sterilization of D. spatulate and D. aliciae explants with 80-90% obtaining aseptic material has been developed. The influence of different sterilization options on the development of microshoots has been studied. The best mode of sterilization is 0,1% solution of AgNO3 and 12.5% solution of H2O2. The features of organogenesis and regeneration of the whole organism from cultivated tissues and organs of Drosera L. was investigated. The effect of exogenous growth regulators at different stages of plant morphogenesis in vitro is shown. Improved conditions of rhizogenesis in vitro. It was found experimentally that MS nutrient media with the addition of 2 g∙l-1 PVP is optimal at the stage of introduction into culture in vitro D. spatulate and D. aliciae. The regeneration of microshoots of D. spatulate and D. aliciae depending on the type of explant and the composition of nutrient media was studied. Morphogenesis was most effective on nutrient media with the addition of 0.25 mg∙l-1 kinetin and on the hormone free MS media. Such cultivation conditions provided 100% regeneration of plants with a reproduction rate of 1:8. Studying the effect of cytokinins on the microclonal reproduction of D. spatulate and D. aliciae, it was found that the development and induction of multiple shoot formation in vitro is best performed on hormone free MS media. To induce the formation of the root system, it is necessary to add into MS nutrient media 0.5 mg∙l-1 IBA. According to the results of the research, a method of microclonal propagation was developed by cutting stem culture, which made it possible to obtain genetically stable, disease-free regenerating plants of D. spatulate and D. aliciae with an optimally formed root system and vegetative mass. The obtained homogeneous planting material can be used in floriculture, creation of terrariums, for pharmacological purposes and for the purpose of introduction. Keywords: Drosera L., microclonal reproduction, morphogenes.
Content of the main components of essential oil in the needles of Scots pine growing in geographic cultures
The aim of the research is to analyze the content of terpenes in the needles of trees of climatic ecotypes of Scots pine growing in geographic forest crops and to reveal the differences in the level of essential oils. The object of the research is 17 Scots pine climatypes growing in geographical plantations on the territory of the Negorelsk Educational and Experimental Forestry Enterprise of the Minsk region in Belarus. Qualitative and quantitative analysis of Scots pine needles essential oil was carried out by gas-liquid chromatography without preliminary fractionation on chromatograph "Kristall 5000.1". In the studied climatypes of Scots pine, different levels of essential oil content among monoterpenes, sesquiterpenes and oxygen-containing groups were determined, as well as significant differences in the content of a number of components within the studied groups were revealed. The highest yield of essential oil is observed in the subspecies of the European Western Scots pine - 1.9%, slightly lower than this indicator in the forest-steppe subspecies (1.7%). This indicator was significantly lower in the European Eastern pine variety - 1.1% and the Siberian subspecies - 1.0%. The obtained data on the composition of essential oil and the ratio of a number of components among subspecies and varieties of Scots pine (subspecies: Lapland, Siberian, forest-steppe, European; varieties: European western and eastern) will further select the most promising climatic ecotypes and subspecies for selection resistance to biotic and abiotic environmental factors, taking into account the growth and productivity of stands. Information on the content of essential oil components in the needles of climatypes and subspecies of Scots pine makes it possible to expand knowledge in the field of plant resistance, their safety and growth, especially in the context of the outlined climate change. Keywords: component composition, extractives, monoterpenes, sesquiterpenes, diterpenes, geographical plantations, climatic ecotype.
Influence of local growth conditions on the change of species composition of mycobiots of pine seeds
The species composition of micromycetes of Scots pine seeds, collected from plantations growing in different forest vegetation conditions and selected from trees of different age groups, was studied. It was found that the most common species of micromycetes - Alternaria alternata, Cladosporium cladosporioides, Fusarium oxysporum, Mycelia sterilia. Dominant species of micromycetes, in particular Penicillium cyclopium, Alternaria alternata, Cladosporium cladosporioides, Fusarium sambucinum, which are the most dangerous for the development of healthy planting material, have been identified. The largest number of micromycetes from seeds of plantations growing wet birch (A3) - 189 and fresh beer (A2) - 103 micromycetes, and the smallest - fresh (B2) and raw subir (B3), respectively: 92 and 93 isolates. The highest frequency of occurrence on experimental samples of seeds of Scots pine, selected from fresh pine stands, had micromycetes: Penicillium cyclopium, Alternaria alternata, Trithothecium roseum micromycetes had the highest frequency of occurrence of Scots pine seeds taken from fresh pine stands, and Mortierella alpine, P. canescens, P. lanosum, P. variabile, Fusarium sporotrich had the lowest frequency. It was noted that Mycelia sterilia (9.2%), Fusarium sporotrichioides (9.6%) were the most common on seeds selected from trees of different age groups, while Alternaria alternata, A. tenuissima, Fusarium verticillioides were the least common. Trichothecium roseum - 1.9%. The similarity of the species composition of mycobiota seeds selected from young and medieval plantations (similarity index - 84.2%) and medieval and mature (similarity index - 89.4%) was studied. Less similarity was observed between the species composition of fungi identified on seeds selected from young and mature plantations (similarity index is -73.6%). The most similar were the seeds of medieval and mature plantations, the least similar - the young and mature. The seeds were selected from different age groups, are different in species composition of micromycetes (similarity varied between 73.6 - 89.4%). Keywords: age groups of trees, mycobiota, type of forest vegetation conditions, micromycetes, Scots pine.
Oscillating drying of red oak wood blanks
The reasons for the reduction in the price of the lamella made of oak wood have been determined. It is established that during the drying of oak wood at low temperatures there is an accumulation of moisture in the near-surface zone, the so-called “conditional source of moisture”. This leads to the formation of light spots in the middle of the lumber, which have long been in conditions of high air humidity and had a low rate of moisture removal. To avoid this defect, it is proposed to intensify the drying process by using oscillating schedules, which consist of periods of heating and cooling of wood. During the heating period, the temperature of the material gradually rises, the wood receives heat stroke and accumulates heat, drying occurs only due to the moisture gradient. During cooling, the air temperature decreases, the degree of saturation increases and, accordingly, the equilibrium moisture content increases. As a result, the surface layers of the material are moistened, the moisture is leveled along the thickness of the wood, there is a relaxation of drying stresses. In the laboratory, experimental studies of oscillating drying of red oak wood blanks with a thickness of 30 and 50 mm were performed. The amplitude of temperature fluctuations is determined - 30 ° С and the expediency of cyclic heating only until the average moisture content of the material reaches 20%, after which the wood should be dried to the required final moisture content at a constant heating temperature. A method for calculating the duration of oscillating drying is proposed, which takes into account the peculiarities of the kinetics of the periods of heating and cooling of sawtimbers made of red oak wood with a thickness of 30 mm and 50 mm. It is recommended to consider the process of temperature change kinetics as the sum of the processes of cyclic heating, which occurs in polynomial dependence, and cyclic cooling, which occurs in exponential dependence. It is determined that the ratio of the duration of cyclic heating to the duration of cyclic cooling is 1/3. Using heat and mass transfer criteria and the experimentally determined coefficient of moisture conductivity of red oak wood, an adequate model for calculating wood temperature and relative humidity during wood heating and cooling cycles has been developed. Based on the obtained results of theoretical and experimental studies, oscillating drying schedules of red oak blanks of different thickness are proposed, which exclude the formation of white spots in the middle of the material. The process was reduced by 1.5–2.4 times and energy consumption was reduced by 1.53 times. Experimentally determined indicators of residual stresses, the magnitude of the stress difference in the workpieces after drying and the values of the tensile strength showed that the quality of drying corresponds to the I quality category according to DSTU 4921: 2008. Comparison of the obtained values with the maximum allowable values of tensile strength across the fibers in the tangential direction σm = 6.5 MPa showed a margin of safety - 25%, which indicates the possibility of using oscillating drying schedules for high-quality drying of red oak wood blanks. Keywords: Red oak (Quercus rubra), moisture conductivity coefficient, oscillating schedules, drying quality, drying duration.
Regarding some mechanical properties of terrace board made of wood-polymer composites with different filler
One of the areas of wood waste processing is their use in the production of wood-polymer composites (WPC). The relevance of wood-polymer products is due to the wide range of applications and qualities of this material. WPC does not rot, is not damaged by insects and fungi, does not contain harmful binders. Products from the duodenum do not crack, do not gouge, are waterproof, which makes them an excellent material for manufacturing a terrace board. However, the terrace board must have certain mechanical qualities, which will allow it to be used in fairly harsh conditions - under the action of humidity, UV radiation and under a certain load. This study aimed to determine the main physical and mechanical properties (density, strength at static bending, modulus of elasticity, water absorption, hardness, abrasion resistance, changes in linear dimensions with changing atmospheric environment) samples of terrace board manufacturing from duodenum with different fillers. Samples from a hollow terrace board, which were filled with polyethylene (PE) and polyvinyl chloride (PVC), were used for the study. Based on experimental studies, it was found that the density of both samples is quite high, close to the maximum; the difference is not significant, but when examining microslices under a microscope in samples with PE as a binder, a larger number of voids is observed, indicating the presence of excess moisture or lack of mineral fillers. It may also indicate the destruction of the polymer. It was determined that a number of other important indicators such as strength at static bending, modulus of elasticity, water absorption, abrasion resistance were the best in the samples with a filler of polyvinylchloride. The greatest difference was in the bending strength index and was 35%. It was also found that the hardness of both samples were equivalent. However, the modulus of elasticity of the sample with a filler with PE exceeded the performance of the sample with a filler with PVC by almost 2.5 times. Thus, based on the research, it is possible to identify a number of clear relationships that indicate that theuse of polyvinylchlorideas a binder significantly improves the physical and mechanical properties of the terrace board based on wood-polymer composite. The results of the research will solve the problem of improving the strength characteristics of wood-composite material to expand the range based on wood waste Keywords: density, hardness, modulus of elasticity, water absorption, abrasion resistance.
Phytodecoration of interiors of the Government House of Ukraine: analysis and proposals
The article presents the features of bioaesthetic characteristics of decorative elements of phytodesign of the closed environment. The analysis of groups of plants by functional and aesthetic purpose in the room is carried out and on their basis project offers on improvement of features of an interior of the House of the Government of Ukraine were developed. When decorating the premises with the help of ornamental plants, the specifics of the interior design of the building and the carefully selected range of plants were taken into account, taking into account the optimal options for their placement. Aesthetic design of free space in the premises is created in order to achieve maximum comfort and coziness and the phytodesign of the closed environment copes with it best. It actively influences the nature of comfort and perception of the interior and is an important component in the design of the environment, and with its help you can increase the artistic expressiveness of the interior, improve its functional organization and, importantly, improve sanitation. The interior design of modern public office buildings is characterized by the predominance of ideas of rationalism and functionality over the aesthetic appearance of the premises. The Government House of Ukraine is the administrative building of our capital, so phytodecoration of its interiors requires careful selection of the range of plants of future phytocompositions. Today, the use of plants in the formation of interiors of various premises is due to the need of man to be closer to nature due to large-scale urbanization of cities and local man-made pollution. To successfully solve these problems requires a comprehensive approach to the wide range of uses and applications of beneficial properties of plants: volatile therapy, color therapy, aesthetic therapy, aromatherapy, ionization and many other functions. Keywords: closed space, public buildings, phytocomposition, phytodesign, phytoergonomics, project proposals.
Age periods of the development of protective forest plantations in the restoration of eroded ravine and ravine lands
At present, high-level attention is paid to the issues of the role, significance, optimal use of soils, their protection and combating degradation. By introducing the Sustainable Development Goals at the national level, Ukraine is obliged to introduce new programs and projects that, in practice, will have macroeconomic stability, ecological balance and social cohesion. During scientific research on the multifunctional role of protective forest plantations, which at one time were created on eroded territories, which include gully-ravine lands, to revive the properties of soils, work was carried out to substantiate their regenerative function. To achieve this goal, 90 soil-forest typological stations were established in erosion control plantations of various periods of plant growth and development with the selection of 270 soil samples. A study of their water-physical and agrochemical properties was carried out with the processing of the data obtained by statistical methods. Based on the analysis of scientific literary sources, the study of successful production experience and our own research on anti-erosion plantations to determine their impact on soil properties and the environment, qualitative stages of the ecological restoration of eroded soils have been developed. Changes in the age periods of growth and development of woody plants in protective forest plantations created on gully-ravine lands lead to a gradual step-by-step ecological restoration of eroded soils. Thus, a clear correlation of the age periods of growth and development of woody plants with the qualitative stages of ecological restoration of eroded soils was obtained. The selection of research objects provided for taking into account the same technology for creating anti-erosion plantings, growth and development in the same conditions, corresponding to five age periods of growth and development of woody plants. In each age period, qualitative changes occur during the growth and development of the vegetation cover, as well as quantitative changes in indicators characterizing the properties of the soil, which are presented in comparison with the control, which is the pasture. The main functions of these plantings are presented. Attention is paid to all age periods of growth and development of anti-erosion plantings in terms of forest measures for the successful cultivation of anti-erosion plantings and their effective action. The stages of ecological restoration of eroded territories are clearly consistent with the identified age periods. The prospects for understanding the process of restoring protective vegetation cover, including forest plantations, and their direct impact on the properties of eroded soils are opening up. Keywords: erosion processes, eroded soils, anti-erosion role, periods of development, qualitative stages, soil properties, hydraulic roughness.
«Green Book»: levels of functioning, syntaxonomy, structuring
The study of phytocenotic diversity in the light of modern scientific concepts of its preservation is now a new and to some extent holistic worldview of this global problem for humanity. According to the panphytocenocentric concept, its solution should be carried out at the local, regional, national and international levels. Protection of phytocenotic diversity in Ukraine has become an integral part of the concept of ecologically balanced development, national programs for biodiversity conservation as a mandatory element of state environmental policy. Therefore, it is important to preserve phytocoenotic diversity as a set of phytocoenotic taxa, which reflect all levels of organization of phytocoenosystems, which were formed in the process of phylocenogenesis in various eco-conditions and assessed by a set of geososological features. The purpose of the publication is a comprehensive level analysis of the current composition of the rare phytocenosis of Ukraine, establishing a new list of rare syntaxons, elaboration of the latest structure of the second official edition of the Green Book of Ukraine and outlining tasks for the future. The issues of the second official edition of the “Green Book of Ukraine” are considered. In this context, a critical analysis of the syntaxonomic composition of the currently functioning rare phytocenofund of Ukraine is carried out, methodological violations of their selection are revealed, the structure of the description of rare syntaxons is offered. The authors have identified 983 associations of 104 formations, which will be taken as the basis for the second official publication of the “Green Book of Ukraine”. An important element of the syntaxonomic protection of vegetation is also the creation of regional (oblast) lists of rare associations based on the principles of creating the “Green Book of Ukraine”. For the first time a modern rare phytocenofund for its main natural regions has been determined: Ukrainian Polissya, Ukrainian Carpathians, Podolsk part of the forest zone, Forest-steppe of Ukraine, Steppe of Ukraine, Mountain Crimea. Keywords: vegetation, rarity association, rarity phytocenofund, Green Book of Ukraine, regional green lists.
Nomenclature of woody plants in the State Register of Plant Varieties of Ukraine
The efficiency of plant resources depends on the correct use of plant names. Ukrainian names of plants belonging to the botanical and agrobiological classification are widely used in the scientific agricultural literature, but both of them are not definitively organized. The crop names have long been used in agricultural practice, in particular during the systematization of regionalized plant varieties. During the registration of a variety, the taxon to which it belongs is indicated and the taxon is indicated by this name in the State Register of Plant Varieties suitable for dissemination in Ukraine. The names of plants adopted in the State Register are a mixture of correct and incorrect names, which arose as a result of an unconscious adaptation of the names of agrobiological nomenclature by likening them to the names of botanical taxa. The list of registered varieties belonging to certain taxa, which are grouped by economic use there is in the State Register. Sometimes varieties and taxa are placed in inappropriate groups. Varieties belonging to the same taxon are sometimes denoted by different species names. Obsolete Latin names or their spelling has a deviation from the accepted given for some taxa of woody plants. Some of the botanical taxa are named by crop names. Russified crop names instead of specifically Ukrainian ones occur and the rules of normative transliteration of varietal names are violated. The plant names constructed in the State Register have negative impact on professional literature. They destroy the system of agrobiological nomenclature and contradict the norms of the scientific style of the literary Ukrainian language. The recommendations of the International Code of Nomenclature for algae, fungi, and plants should be followed and the «Rules of Plant Nomenclature, Taxonomy, and Cultonomy», designed to regulate Ukrainian plant names to correct these shortcomings, should be applied. Keywords: taxa, species, trees, plant names.
Environmental consequences of negative impact of unauthorized amber mining in forest areas of Zhytomyr region
Amber mining has already led to an environmental catastrophe on a regional scale. According to official data, more than a thousand hectares of land, mostly located in the Central Polissya region (Zhytomyr region), have suffered very severe damage and need to be restored. The conservation value of such areas is lost, and further use for forestry or agriculture is very risky. To develop norms of anthropogenic loads on landscapes, it is mandatory to study anthropogenic transformation by identifying their current ecological status, establishing the dependence of changes on the intensity of anthropogenic loads individually for each natural region. The source materials for obtaining the results are the materials of field research, taxonomic descriptions of plantations, satellite and aerial photographs, as well as the establishment of temporary test areas according to the generally accepted methodology in forestry. The problem that arose in the Zhytomyr region as a result of unauthorized amber mining contributes to the rapid growth of anthropogenic pressure on forestry landscapes, causes them irreparable damage, leads to environmental and economic crisis, imbalances in the social situation of the population, environmental problems, there are significant changes in the structure and mineral composition of the soil layer of forest lands, completely or partially destroyed the living above-ground cover and undergrowth, undergrowth undergoes significant changes in habitat conditions and anthropogenic pressure. Violation of the ecological balance of the forest at different stages of biological development can lead to irreversible consequences in the forestry sector. The obtained results are promising for further development of own methods of ecological and economic assessment of the damage caused by the consequences of illegal amber mining. Keywords: dendrorecultivation, amber, forest areas, erosion, ecology.
Estimation of 90Sr content in wood of scots pine based on measurement surface flux density of beta-particles from stem bark
This paper presents an approach for indirect measuring of 90Sr activity concentration in stem wood of Scots pine`s live trees within the Chernobyl exclusion zone based on values of beta-particles surface flux density from stem bark at a thee height of 1.3 m above the forest floor that obtained by use STORA-TU RKS-01 radiometer-dosimeter under field condition. The similar express-methods often consider in scientific publications so as they allow to obtain probable levels of radiation contamination without taking samples for laboratory measurements. That in turn can be used to optimize sampling or for example in the case of the need to preserve the intact initial state of the biota during long-term in situ or/and in vivo observations. The empirical data for validation of the method have received on 13 experimental sites of artificial (plantation) even-aged stands which consist only of one woody species: Scots pine. The correlation analysis discovered statistical significant relation at p-value=0.05 between arithmetic averages of beta-particles surface flux density from stem bark of pine trees at the forest sites and 90Sr activity concentration in stem wood elements (sap wood, heartwood and all stem wood), and functional dependencies among these parameters are described by a simple linear equation with only one slope parameters (R2 = 0.90–0.96) whose predicted values for sap wood, heartwood, and all stem wood are (± standard deviation) 23.1±8.5, 42.3±10.3, and 26.8±6.8 Bq·cm2·min·(kg·pcs)-1, respectively. Moreover, the influence of biometric indicators of individual trees (diameter, height, age) on this pattern was not detected. However, the average diameter (DBH) of stands has the strongest influence among forest inventory indicators on the value of the 90Sr activity concentration ratio between sap wood and heartwood (r = 0.93), that is, the radial distribution of the studied radionuclide in stem wood of pine trees. The results of these studies should be confirmed by a larger collection of observations for Scots pine given the small sample size for her in this paper. Also, scientists are necessary to include empirical data for other major forest-forming woody species within the research region due to the importance of using express-methods of radioactive contamination levels estimation for the planning and optimization of forest management. Keywords: forest ecosystem, radionuclid, activity concentration, sap wood, heartwood, stem wood, Chernobyl exclusion zone.
Establishment of moisture diffusion regularities through the polymer shell of thermally modified wood
An analysis of the process of thermal modification of wood, which was obtained by a controlled heating process, was done. The unique technological properties (durability, low hygroscopicity and dimensional stability) of thermomodified wood make it possible to use it in various scope. Due to the influence of temperature there are some chemical changes in the structures of the wood cell wall components (lignin, cellulose and hemicellulose). This leads to an increase in density, hardness, improved hydrophobicity (water repellency), thereby reducing their ability to absorb moisture and swell. The products absorb moisture gradually, are less prone to swelling and shrinkage, but still need the elastic coatings application. It is proved that heat-treated wood turns gray over time under the influence of sunlight, and therefore requires additional surface treatment with a coating. Additional protective substances application on the thermo-modified wood products surface promotes dimensional stability and protects against rapid weathering of the surface in open air conditions. The use of transparent coatings and oils does not protect the surface from discoloration during weathering. They are recommended for products are manufactured from thermomodified wood, which are operated away from direct sunlight and rain. The parameters of moisture penetration into wood are mathematically modeled on the basis of the moisture diffusion quasi-stationary equation through the polymer coating on the flat sample surface. The dynamics of moisture content changes in thermally modified wood by different schedules parameters has been experimentally studied. The obtained mathematical relations based on the experimental studies results make it possible to calculate the moisture diffusion coefficient in thermally modified wood in the presence of a polymer shell. It is established that the wax coating application on the surface of the product reduces the moisture diffusion process more than 10 times for surfaces treated at a temperature of 160 °C for 1 hour. That is, such products can be used on objects with high humidity. Keywords: wood, efficiency of thermal modification, moisture absorption, water diffusion, decomposition, wood stability.