Porohnyach I. The current condition and characteristics of formation of spruce stands in Novgorod-Severske Polissya

Object – formation and pathological processes of spruce stands of Novgorod-Severske Polissya; the aim – identification of the features of the current state and the formation of spruce plantations of Novgorod-Severske Polissya and substantiation of measures to increase their biological stability and productivity; the methods – forestry, forest mensuration, dendrochronological, forest pathological, mathematical and statistical ones; the novelty – age structure, features of the current state and productivity of spruce forests in the Novgorod-Severske Polissya were defined; comparative estimation of the actual productivity of derivatives of artificial spruce forests by types of forest in which they are widespread were provided; the volumes and structure of spruce stands subjected to drying were determined; age of quantitative maturity of derivatives stands, the features of the influence of climatic factors on spruce growth and ecological factors, which cause the weakening and dying of fir trees, features of the expansion of foci of shrinking in spruce stands were specified; the results – new theoretical and practical principles for the creation and formation of resistant plantations with the participation of spruce in the composition in accordance with the type of forest conditions under conditions of periodic aridity of the climate were justified. The implementation of a define age of maturity for spruce plantations in operational forests will improve the efficiency of forest management in the research region. The results of research and the basic provisions of the dissertation were introduced into forest management activities; the sphere of application – forestry.