Comparative Ecological and Physiological Characteristics of the Response of Oak (Quercus robur L.) Seed Stands to Forest Growth Conditions. P. 48–59

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UDС

631.811:581.131:662.632:676.031.11

DOI:

10.37482/0536-1036-2025-6-48-59

Abstract

A comprehensive retrospective ecological and physiological analysis of tabular data on the dry mass of stands of the genus Quercus aged from 10–20 to 140–200 years has been carried out in order to convert them into quantitative indices of the functioning of the root system, leaf apparatus, net primary productivity and carbon sequestration adapted to environmental conditions from the broad-leaved forests of Germany to the southeastern reaches of the Russian Plain. Ecological and physiological characteristics have been calculated for 1 conventional tree of average dry weight. Biological productivity has been determined by the relative increase in the average dry weight of a tree in adjacent ages. Quantitative indices of mineral productivity of the root system have been established using the method by V.M. Lebedev (adapted by E.V. Lebedev to forest woody plants), and net photosynthetic productivity has been established using the method by A.A. Nichiporovich. A negative relationship has been revealed between the net photosynthetic productivity, net primary production, biological productivity and plant age, and a positive one between mineral productivity, net photosynthetic productivity and biological productivity (r = 0.863…0.998 and 0.797…0.991). The relationship between the ratio of root potential to photosynthetic potential and plant age has turned out to be highly positive (r = 0.863…0.980), while the relationship between the ratio of root potential to the photosynthetic potential and mineral productivity, net productivity and biological productivity has been highly negative. The relationship between mineral productivity and plant age has been negative. A decrease in the absorption activity of the roots has activated a non-specific adaptive response affecting physiological, functional and morphological processes that enhance the supply of mineral nutrients to the aboveground organs, ensuring photosynthesis and stabilizing the biological productivity of the plant. Under these conditions, a transfer of metabolic processes at the organism level during the ontogeny to a mode of more efficient use of nitrogen during the formation of biomass to maintain homeostatic equilibrium in the biological system has been demonstrated.

Authors

Valentin M. Lebedev, Doctor of Agriculture, Prof.; ResearcherID: M-8699-2019, ORCID: https://orcid.org/0000-0003-3316-854X
Evgeny V. Lebedev^, Doctor of Agriculture, Assoc. Prof.; ResearcherID: G-9445-2019, ORCID: https://orcid.org/0000-0002-5824-6981

Affiliation

Nizhny Novgorod State Florentyev Agrotechnological University, prosp. Gagarina, 97, Nizhny Novgorod, 603107, Russian Federation; proximus39@mail.ru, proximus77@mail.ru^

Keywords

Quercus, mineral nutrition, photosynthesis, net primary production, carbon sequestration, organism level, ontogeny, the European range of oak

For citation

Lebedev V.M., Lebedev E.V. Comparative Ecological and Physiological Characteristics of the Response of Oak (Quercus robur L.) Seed Stands to Forest Growth Conditions. Lesnoy Zhurnal = Russian Forestry Journal, 2025, no. 6, pp. 48–59. (In Russ.). https://doi.org/10.37482/0536-1036-2025-6-48-59

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