Abstract
The work is devoted to the study of the interrelationships of the productivity of pine stands with climatic factors of the regions of the Central Federal District of the Russian Federation. One of the most effective tools for identifying patterns of natural formation of plant communities is multiple regression analysis, thanks to which it became possible to obtain complex models combining quantitative relationships and encoded qualitative (nominal) characteristics with binary variables that take into account regional features of the formation of plantings and their productivity. An attempt is made to substantiate the differentiation of the stock of complete and pure pine stands of the Central Federal District under the influence of climatic indicators characterizing atmospheric humidifi cation and temperature regime of the subjects of the Russian Federation at fixed average heights of stands with a five-meter gradation of 15, 20, 25 and 30 m. The rationale for the presence of regular changes in the stock from climatic indicators is confi rmed by strict statistical judgments regarding the reliability of the determination coefficient (R2). In all cases, the calculated value of Fischer’s F-test exceeded the value of a similar criterion by a 1 percent significance level with the corresponding number of degrees of freedom, which indicates the probability of an error in only one percent of cases. The regressions obtained are reliable and allow us to assess the potential productivity of stands, which is largely determined by soil and climatic conditions, as indicated by V.V. Dokuchaev, G.N. Morozov, G.N. Vysotsky, V.N. Sukachev, A.I. Utkin, etc. The inclusion of indicators of the closeness of the forest canopy in the model, taking into account natural zoning, allows us to move from assessing the potential productivity of stands to the actual one. The combination in the models of standards of potentially possible productivity of stands and climatic indicators characterizing atmospheric humidifi cation and temperature regime makes it possible to gain a deeper understanding of the process of formation of forest productivity in order to build an environmentally sound system for managing wood resources of the Central Federal District of the Russian Federation.
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