Modeling of growth and development of modal fir and spruce stands in Middle Siberia

Abstract At present, a significant area of Siberian dark coniferous forests is characterized by a significant decrease in resistance due to recurrent forest fires, mass reproduction of insect pests and diseases, which leads to their natural degradation and death. However, the intensity of the growth processes of the coniferous stand under certain forest conditions persists in the long term. Therefore, the creation of regression models of the course of forest growth with the identification of forest conditions is very important both from the point of view of practice and environmental monitoring. The object of the study was the stands of Siberian fir ( Abies sibirica Ledeb) and Siberian spruce ( Picea obovate Ledeb) of bonitet classes III-IV, growing in the conditions of the West Siberian southern taiga plain forest region on the territory of the Yenisei forestry of the Krasnoyarsk Territory. The initial data for studying the processes of natural growth of fir and spruce plantations were the materials of the mass inventory of 11097 units. As a result of the work carried out for modal fir-spruce stands, concentrated in the territory of Central Siberia (Yenisei forestry of the Krasnoyarsk Territory), regression models of the growth course have been developed, which make it possible to predict the dynamics of taxation indicators and reproduce the succession picture of the development of stands.