Dry Matter Content in Fractions of Aboveground Phytomass of Forest-Forming Species of Eurasia
- Authors: Usoltsev V.V.1, Plyukha N.I.1,2
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Affiliations:
- Ural State Forest Engineering University
- Botanical Garden, Russian Academy of Sciences, Ural Branch,
- Issue: No 1 (65) (2025)
- Pages: 6-18
- Section: FORESTRY
- URL: https://journal-vniispk.ru/2306-2827/article/view/303796
- DOI: https://doi.org/10.25686/2306-2827.2025.1.6
- EDN: https://elibrary.ru/CVACMC
- ID: 303796
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Full Text
Abstract
In the context of the continuously increasing global role of the planet's forest cover, the study of qualimetric indicators of trees and stands is becoming one of the priorities. The dry matter content (DMC) in plant tissues is an important but insufficiently studied factor. Determination of DMC in the phytomass of trees as a measure of organic matter and carbon concentrations in it is an essential stage in studying biological productivity, phytomass and net primary production of trees and stands. Various fractions of tree phytomass differ in the DMC-moisture ratio, which affects the rate of natural decomposition and the return of carbon and nutrients to the environment. Since DMC in fractions of the aboveground phytomass of forest-forming species of Eurasia have not been previously studied at the transcontinental level, the aim of this study is to identify species-specific features of DMC in the aboveground phytomass fractions, as well as the DMC ratios in its various fractions, for which species-specific regression models of DMC in phytomass should be developed that will describe its dependence on dendrometric indicators of trees in Eurasia. Objects and methods. To achieve this aim,
7,068 indicators of DMC in different fractions of aboveground phytomass of 14 forest-forming species were selected from the author's database on the qualimetry of the main species of Eurasia. Based on them, mixed-type models were built, in which the contribution of dendrometric indicators and dummy variables encoding the belonging of DMC to certain species amounted to 8 and 92 %, respectively. Results. It was found that DMC in the stem wood varies from 72.5 % in Fraxinus excelsior to 42.7 % in Abies alba; DMC in the stem bark varies from 63.4 % in Robinia pseudoacacia to 44.3 % in Picea abies, respectively; DMC in (needle) foliage varies from 52.0 % in Pinus nigra to 28.4 % in Tilia cordata; DMC in branches varies from 69.4 % in Fraxinus to 46.1 % in Tilia, respectively. The difference between DMC in the stem bark and DMC in the stem wood varies from +11.6 % in Pinus nigra to -10.1 % in Fraxinus; the difference between DMC in the branches and DMC in the stem wood varies from +10.1 % in Abies to -10.3 % in Betula pubescens; the difference between DMC in the stem bark and DMC in the branches varies from +18.4 % in Betula pubescens to -6.0 % in Fraxinus. Finally, the difference between DMC in branches and DMC in foliage varies from +31.4 % in Fraxinus to -1.2 % in Pinus nigra. Conclusion. The developed regression models of DMC in phytomass fractions have demonstrated significant differences in DMC between fractions and species, which must be taken into account when assessing the carbon depositing capacity of the forest-forming species of Eurasia.
About the authors
V. V. Usoltsev
Ural State Forest Engineering University
Author for correspondence.
Email: Usoltsev50@mail.ru
Doctor of Agricultural Sciences, Professor of the Department of Forest Taxation and Forest Management
Russian Federation, 37, Sibirskii Trakt, Yekaterinburg, 620100N. I. Plyukha
Ural State Forest Engineering University; Botanical Garden, Russian Academy of Sciences, Ural Branch,
Email: Usoltsev50@mail.ru
Postgraduate student of the Ural State Forestry Engineering University;
Junior Researcher at the Botanical Garden of the Ural Branch of the Russian Academy of Sciences
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