Some Features of the Growth of Siberian Cedar Pine Outside Its Natural Range (On the Example of the Bryansk Region)

Siberian stone pine (Pinus sibirica Du Tour) is a valuable introduced species of the Bryansk forests. Analysis of the distribution of this tree species in the state forest fund of the Bryansk region, identification of forest growth conditions that best meet the requirements of P. sibirica, is of scientific and practical interest. The aim of the research was to identify the growth patterns of Siberian stone pine by diameter in various hydrological conditions. Analysis of wood cores taken from 20 trees in forests operating in automorphic and semi-hydromorphic landscapes on the territory of the Experimental Department of Introduction and Forestry of the Educational and Experimental Forestry Enterprise of the Bryansk State University of Engineering and Technology revealed the dynamics of radial increments for the period from 1990 to 2024. Dendrochronology methods were used to determine the growth patterns of Siberian stone pine by diameter on automorphic and semi-hydromorphic soils. Under normal moisture conditions, a moderate negative correlation was found between the growth and the average annual temperature of the current year and a positive correlation with the amount of precipitation in July of the current vegetation period. Under excessive moisture, moderate and noticeable negative correlations were found between the growth and the temperatures of June, July, August, September, the average annual temperature of the current year, and the temperature of November of the previous year. On automorphic soils, the value of radial growth was greater than on semi-hydromorphic soils. Regardless of the hydrological regime of the soils, pronounced inhibition of growth by diameter in Siberian cedar pine was observed in 1992, 2002, and 2010.