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Mechanical stability of Virginian juniper trees in steppe zone of the eastern-european plain
- Authors: Kornienko V.O.1, Kalaev V.N.2
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Affiliations:
- Donetsk State University
- Voronezh State University
- Issue: No 1 (2024)
- Pages: 70-78
- Section: RESEARCH
- URL: https://bakhtiniada.ru/0024-1148/article/view/261245
- DOI: https://doi.org/10.31857/S0024114824010084
- EDN: https://elibrary.ru/slljxy
- ID: 261245
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Abstract
The paper establishes a relationship between the temperature factor, a physico-mechanical parameter — the modulus of elasticity of the Virginian juniper (Juniperus virginiana L.) wood tissues and its crown architectonics. Thus, with high positive temperatures in summer, a decrease in the elastic modulus leads to slow bending of the skeletal branches, which, in turn, affects the crown projection area, as well as its light permeability and, as a result, the temperature and humidity under the canopy. First of all, the temperature will affect the mechanical stability of trees, which is characterised by a critical ratio of the trunk diameter to its length (coefficient d/l ≤ 0.009) and the lowest range of the trunk’s resilience. The article developed a scheme for the mechanical stability of the Virginian juniper — due to the appearance of gaps and, in general, changes in the architectonics of the crown, uneven heating of the trunk occurs, which leads to a disruption of its uniformity in terms of the physico-mechanical properties of tissues. Irreversible deformations and numerous trunk breakages were revealed at an average height of 1.5 ± 0.5 m and in the root collar zone. As a result, the light regime of the forest stand is disturbed, which affects the phytoclimatic and bioecological features of the forest steppe plantations. A change in the phytoclimate under the canopy towards increased illumination due to a change in architectonics leads to a decrease in stability and, as a result, the inability of woody plants to resist the pressure of aggressive herbaceous and tree-shrub vegetation.
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About the authors
V. O. Kornienko
Donetsk State University
Author for correspondence.
Email: kornienkovo@mail.ru
Russian Federation, Universitetskaya st., 24, Donetsk, 83001
V. N. Kalaev
Voronezh State University
Email: kornienkovo@mail.ru
Russian Federation, Universitetskaya sq. 1, Voronezh, 394018
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