Home – Home – Jornals – Siberian Journal of Forest Science 2024 number 4

Bioecological characteristics (allometry, viability, morphometry) of the pyramidal shape of pedunculate oak ( Quercus robur L. var. pyramidalis ) under conditions of anthropogenic pollution of the city of Donetsk in the south of the East European Plain (Donetsk Ridge) were studied. The higher viability of control group of trees (1 point, healthy trees) compared with the experimental group (1.5 ± 0.5 points, healthy trees, rarely weakened) growing in anthropogenically polluted areas. The diameter of the trunks of the experimental group is on average 34 % higher than the diameter in control pedunculate oak stands. The volume of the stem and phytomass of various fractions of pyramidal pedunculate oak trees growing under conditions of anthropogenic load are ~ 50-70 % greater than for the control area. Moreover, the allometric dependencies in the two territories have the same patterns and are subject to power-law regression. The allometric ratio of the diameter to the length of the trunk ( d : l ) for both the control and experimental groups had a high value and amounted to 0.04-0.05. Deformations of the stems were not observed due to the high mechanical stability. The crown architecture underwent transformation in the presence of skeletal branches with a diameter to length ratio d : l < 0.01. In the course of studies of crown architectonics, irreversible deformations of skeletal branches of various orders (mostly small ones) were revealed in two territories equally, but no breaks or changes in crown closure were observed, the degree of plant accidents was at a low level (no breakages after removal of loads). Pedunculate oak trees are recommended for use in the formation of long-term plantings in industrial cities, because they retain high viability, mechanical stability and stable allometric indexes on which the stability of the entire plant depends.