Aleksiiuk I. Prognosticating of growth of natural pine tree stands of Ukrainian Polissia

Research of the dissertation is directed to advanced study of the condition and dynamics of inventory indexes of modal natural pine trees stands of Ukrainian Polissia in order to create the model of dynamics of main inventory indexes of stands and growth prognosticating. The dissertation presents the detailed analysis of inventory indexes of natural pine tree stands of Ukrainian Polissia and of associated tree species, which form the tree layer. Essential attention is fixed on interconnection of inventory indexes of separate elements of stand’s tree layer. In result of modelling we received the models of average dynamics in height, diameter, species height, store, part of tree species in the tree layer. The developed models allowed forming the tables of growth process of modal pine tree stands of natural origin of Ukrainian Polissia. The system of stand growth prognosticating is grounded on the ratio of separate inventory index of the next year to the current year. Equations for stand growth prognosticating are developed using models of dynamics of separate inventory indexes. In order to check the objectiveness of prognosticating we have developed the module of stand inventory indexes updating and performed updating for the periods of five and ten years. The comparative analyses of averaged indexes of average heights, diameters and stores allows confirming the objectivity of received indexes in comparison with inventory indexes, which were not prognosticated.