Assessment of the natural regeneration of tree species in continuous logging in the Aldan forestry of the Republic of Sakha (Yakutia)

The purpose of the research is to assess the state of natural renewable undergrowth after continuous logging in the Aldan forestry of the Republic of Sakha (Yakutia). The article presents the results of field studies evaluating natural reforestation in continuous deforestation in conditions of multi-year permafrost in the Republic of Sakha (Yakutia). The research was conducted in 2024 in the Aldan forestry and the Tommotsky district forestry of the Republic of Sakha (Yakutia) after continuous logging in 2014, 2019 and 2022. The undergrowth was counted on accounting sites with an area of 2 × 2 m. In total, 25 test sites were laid at each logging site on the portages along the running lines. In 2014, the size of the test area was 0.1 ha (50 × 20 m). Deforestation is resumed with tree species characteristic of the research area – larix, betula, picea, pinus. Viable undergrowth from 83 to 90% prevails in the cuttings. In 2022, the number of shoots of viable Larix undergrowth is 2.0 thousand units/ha, pinus – 8.0 thousand units/ha, picea – 4.5 thousand units/ha. The resumption of associated tree species, salix and betula, in the amount of 2.0 and 8.1 thousand units/ha, respectively, is noted against the background of deforestation in 2014. In the high-altitude structure of the undergrowth, large specimens occupy the dominant position (73%).

Larix is being renewed in the amount of 3.9 thousand units/ha. In 2019, dense viable small undergrowth of pinus appeared in the amount of 2.0 thousand units/ha, picea – 0.8 thousand units/ha, betula – 3, 1-8 thousand units/ha. It should be noted that according to the number of viable undergrowth of the main breeds, natural regeneration is assessed as satisfactory.

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