ЗАКОНОМІРНОСТІ ТАКСАЦІЙНОЇ БУДОВИ ВІЛЬХОВИХ ДЕРЕВОСТАНІВ ЛІВОБЕРЕЖНОГО ЛІСОСТЕПУ УКРАЇНИ
Abstract
PECULIARITIES OF THE TAXATION STRUCTURE OF ALDER STANDS OF THE LEFT-BANK FOREST-STEPPE OF UKRAINE
V. Pasternak, S. Bugayov
Abstract. Ensuring forestry on the principles of sustainable development requires the development of appropriate regulatory and informational materials for the evaluation and prediction of the growth of the main forest-forming species, taking into account zonal features. The aim of the study is to identify the peculiarities of alder stands structure in the left-bank forest-steppe of Ukraine, as a prerequisite for the modeling of their commodity structure. Analysis of the stem distribution for diameter classes (depending on age and yield class), the determination of grades and reduction-numbers was held. To conduct a comparative analysis of the distribution series of trees the transition from the absolute values of the diameter in centimeters to the relative, expressed in parts of the mean diameter was performed. Distribution of the total number of stems on the absolute and relative degrees of thickness in the context of site quality classes and number of dynamics of relative degrees of thickness with age was analyzed. Comparison of the results of the taxation structure with those of other authors was conducted. Peculiarities of structure change of alder coppice stands to age were set. For various stands of site class rank of the average tree, reducing-number of diameter, coefficient of variation, asymmetry indices and other statistical indicators was identified.
Keywords: alder, coppice stands, taxation structure, natural classes of thickness, normal distribution, average rank of the tree, reducing-number, asymmetry.
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