Phenological studies of various types of larches growing on the territory of the main Botanical Garden of the Russian Academy of Sciences
Year: 2025
Type: article
Abstract: The paper presents the timing of the onset of the phenological phases of various species of larches growing in the center of the European part of Russia. The swelling and budding, the unfolding of needles and the complete ap-pearance of the needles, the beginning and end of the appearance of strobils, the appearance of autumn color of nee-dles and the falling of needles were taken into account. It has been established that the spring phases can begin on April 5, when the buds swell and end with the formation of strobils and the appearance of needles until May 3. The period from the appearance of the autumn color of the needles to the complete fall of the needles can last from September 23 to December 8. Differences in seasonal development between American, European, Siberian, Sukachev's, Kempfer's, Lyubarsky's, Potanin's, Korean Dahurian, Dahurian, and Kurile Dahurian larches have been established. The data ob-tained are necessary to assess the adaptive potential of these plants under the conditions of introduction. We calculat-ed the sum of positive temperatures necessary for the swelling and budding, the unfolding of the needles, the complete appearance of the needles, the beginning of the appearance of the strobils, the mass appearance of the strobils, the end of the appearance of the strobils, the appearance of the autumn color of the needles, the beginning and end of the fall of the needles. The analysis of interspecific differences in seasonal development revealed significant variability: the same species of larch can show significant differences in the duration of phenological phases in different years. We have presented the results of the study for 2022, 2023 and 2024. Climatic differences in these years have been re-vealed. The graphs show the relationship between the accumulation of positive temperatures and the onset of pheno-logical phases, which confirms the need to take into account the temperature factor when predicting the appearance of strobils. All the studied species have successfully passed the full cycle of seasonal development.
Source: Forestry Engineering Journal
Institution: Moscow State Forest University
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: diamond
OpenAlex ID: W4411933554