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Regularities of the English Oak Growth in the Protective Plantings of the Steppe and Forest-Steppe of the Volga Upland

Proezdov Piotr Nikolaevich, Leskov Dmitry Vladimirovich, Mashtakov Dmitry Anatolyevich, Avtonomov Alexey Nikolaevich, Rozanov Alexander Vladimirovich

Regularities of the English oak growth in the protective plantings of the steppe and forest-steppe of the Volga upland

The purpose of the study is to establish the regularities of the English Oak growth in protective forest stands on erosion-prone slopes in the steppe and forest-steppe of the Volga upland. Studies have established a natural decrease in the height of the English oak on the southern chernozem and gray forest soil by 6.9%-11.3% with a slope grade increase by 2 times, which is associated with a drop in soil fertility as a result of increased erosion. The index of oak growth intensity with an increase in slope grade increases on both types of soils by 21.4%-38.5%, and the cambium productivity decreases by 14.1%-23.6%. The same trends in the dynamics of taxation indicators refers to the accompanying English oak species – Norway maple and small-leaf linden. The determination coefficient of the connection of the English oak growth in the height with the index of growth intensity and productivity of cambium are 0.95-0.98, which indicates a close interdependence.