Abstract

A direct dependence of the birch coppice regeneration on the diameter of the tree trunk, felling age, forest growth conditions, seed regeneration, soil and climatic conditions and the degree of soil mineralization has been revealed. It was found that after the dying of a 30-year-old birch due to a drought in 2010, coppice shoots appeared in 10 % of the trees on the studied area. The reasons for vegetative regeneration have been determined, which mainly occurs by the degree of thickness in trees with a trunk diameter of up to 22 cm, or by the category of state in dead wood (70 % of the total number of coppice). The absence of seed birch undergrowth in drying birch plantations was found as a result of the tremendous soil ramping and the predominance of small-leaved lime, aspen undergrowth, Norway maple of seed origin, and seed origin oak, which requires tending. For successful birch seed regeneration under favorable climatic conditions, it is recommended to carry out soil mineralization of at least 50 % of the total area. When carrying out vegetative propagation, it is necessary to cut birch no older than 40 years, and in case of useful properties loss in birch forests over 71 years old in protective forests, we recommend the use of clear cutting but not selective cutting. Keywords: natural renewal, hanging birch, undergrowth, logging, Republic of Tatarstan

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