Assessment of the main taxation indicators of common pine in the Kolyvan district

The paper considers the biological features of growth and development of pine stands in Kolyvan forestry of the Novosibirsk Oblast. The correlation of indicators characterizing the productivity of pine stands is revealed. The distribution of forested area and reserves by age groups for the period from 1979 to 2021 is analyzed.

The research and analytical review of the data on the dynamics of pine plantations change by the main taxation indicators determining the features of growth and development of the stand have been carried out.

The character and structure of pine stands location on a certain territory of the forest management area was determined in order to assess the current state and forecast further target use for obtaining forest.

The regularities of age changes in the main taxation indices of common pine trees with a periodicity of about ten years have been revealed to assess the effectiveness of forest management measures.

The long-term analysis of the distribution of the area of plantations by age groups indicates a rather uneven distribution of individual groups. During the initial period of the study from 1979 to 1996, a significant share of the middle-aged group was established, with a decrease in the percentage of young stands and an increase in the share of mature and overmature stands. Since 2006, a tendency of increasing percentage of mature and overmature stands and a significant decrease in the group of young stands was noted. In 2021 the share of mature and overmature stands increased to 56%, there is no increase in the area occupied by young stands. Uneven distribution by age and area groups on lands covered with forest vegetation is observed.

In addition to changes associated with the transformation of forest area, changes in the area by age groups are also caused by the natural transition of plantations from one age group to another, the formation of natural young stands on non-forested and forested lands, and the conversion of unbroken forest crops into forested lands.

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