THE STATE AND GROWTH OF SEEDLINGS OF SIBERIAN LARCH ECOTYPES IN EXPERIMENTAL PLANTINGS OF THE AKADEMGORODOK OF KRASNOYARSK
T. S. Sedel’nikova, A. S. Aver’yanov, A. V. Pimenov, I. M. Danilin, I. A. Tselitan
Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, V. N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation
Keywords: Siberian larch, ecotypes, seedlings, saplings, survival rate, increment, variability
Abstract
The article presents the results of a sowing experiment (2016-2024) to assess the safety, growth and condition of seedlings/saplings of forest-swamp and forest-steppe ecotypes (origins) of Siberian larch ( Larix sibirica Ledeb.) planted in a forest area of Akademgorodok in Krasnoyarsk, and to assess the prospects for their use in urban greening. After transplantation from the sowing department in 2022, 6-year-old seedlings showed absolute survival. In the year of transplantation, during the initial examination, some of the young Siberian larch seedlings were found to be affected by hermes ( Adelges laricis Vall.) and larch bud midge ( Dasyneura laricis F. Low.), early yellowing, wilting and needle fall, which did not have a noticeable effect on survival. During the repeated examination, taking into account the degree of preservation of the needles, most of the seedlings of both forest-swamp and forest-steppe origin were characterized by satisfactory and good condition. The absolute growth of seedlings/saplings of the forest-steppe ecotype of Siberian larch was higher than that of the forest-swamp in the year of sowing seeds (2016) and in the year of transplanting young trees (2022). Statistically significant differences in growth between seedlings of forest-swamp and forest-steppe origin appeared when transplanting plants. In other years, greater growth was recorded in seedlings/saplings of the forest-swamp ecotype, compared to the forest-steppe. In 2024, seedlings of the forest-swamp ecotype of Siberian larch had a greater average height compared to the forest-steppe ecotype. Saplings of forest-swamp origin were distinguished by a wider range of height variability, while trees of forest-steppe origin had more even values of variation of this trait.
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