Peculiarities of diameter distribution and dynamics of marketability structure of alder stands in Slobozhanskyi forest typology district
DOI:
https://doi.org/10.31548/forest2021.01.002Abstract
A review of literary sources on the diameter distribution of trees and marketability structure of black alder stands in the Slobozhanskyi forest typological district and the whole of Ukraine is carried out, the relevance of this study is established. Comparison of forest typological and forest management zoning is presented for a clearer identification of the study region, as a prerequisite for the creation of regional standards for forestry. The analysis of the distribution of black alder in the forest fund of the study region is carried out and the forestry and evaluation indicators of the alder forest stands are studied. The distribution of black alder stands of the region by origin, forest types, density of stocking and productivity has been evaluated. The evaluation indicators and marketability structure of black alder stands in the study region are considered. Models of the diameter variability of the modal stand, the ratio of the variability of the industrial timber part to the total dimensional variability of the stand, taking into account the minimum and maximum diameters in the modal stand, have been calculated. The relationship between the proportion of industrial timber and the age of modal alder stands of coppice origin has been established. The tables of the marketability structure dynamics of modal alder stands were created, taking into account the distribution of the volumes of industrial timber by dimensional classes, consistent with European approaches to round timber measurement. When compiling the standards, the previously developed yield tables of modal black alder stands of coppice origin of the Slobozhanskyi forest typological district, a comparative analysis of the dynamics of the output of industrial timber in modal black alder stands according to different standards is carried out. When comparing the standards developed for the Slobozhanskyi forest typological district with the standards developed for the whole of Ukraine, it was found that in the latter the output of industrial timber is significantly higher, which is primarily associated with the forest site conditions of the region and the coppice origin of forest stands.
Keywords: modal stands, black alder, marketability, dimensional classes.
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