Assessment scale of reforestation process and growth intensity of young pine trees on fallow lands of the Krasnoyarsk forest-steppe

Forests play an important role in the global carbon cycle and climate stabilization. Reforestation of abandoned and non-agricultural lands is a significant mechanism for mitigating the effects of climate change. In the Krasnoyarsk forest-steppe, on former agricultural lands, predominantly pine stands are formed, characterized by a homogeneous composition, with rare presence of birch, larch and spruce. A clear stage-by-stage development of these pine stands is observed. Three main stages can be distinguished: the formation stage (age up to 10 years), characterized by a period of restoration and early development of tree species; the moderate growth stage (11–17 years), when there is an intensive increase in biomass; and the intensive growth stage (18 years and older), which is characterized by maximum development and growth of pine trees. The Gompertz equation was used to study the dynamics of pine forest growth in height. Based on the structure of grouped rows by diameter, the analysis of the process of pine forest formation in post-agricultural conditions was performed. The criterion was the assessment of the form of distribution series. As a result, the process of reforestation of pine forests on former agricultural lands of Krasnoyarsk forest-steppe was characterised. Analysis of the forms by tree diameter makes it possible to assess the dynamics and characteristics of restored stands. This approach allows for a more accurate determination of the stages of pine forest development on fallow lands and the development of optimal strategies for managing forest restoration processes in the region. The results obtained are of practical importance for monitoring and planning measures to restore forest ecosystems on former agricultural lands. Such an integrated approach, based on a combination of analytical methods and specific data, allows for a more efficient use of the potential of forest ecosystems to mitigate the effects of climate change.

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