DYNAMICS OF LONG-TERM SECONDARY ASPEN STANDS IN THE SOUTHERN URAL
The quantitative indices of the structure and dynamics of long-term secondary aspen stands of the northern part of the Southern Ural were analyzed. The data was obtained by a large-scale forest inventory on the principles of genetic classification of forest types. The change of the participation of dark-coniferous species in the structure of long-term secondary aspen stands until natural mass aspen destruction at 100 years age and older is not observed. The small proportion of spruce and fir in the stand structure is caused not only by the small quantity of dark coniferous regrowth intended for cutting, its low survival after cutting, but also by its low competitive ability compared to aspen. The fir dominates in the regrowth. The large-scale forest inventory data confirmed the scheme of dark coniferous species restoration developed on the basis of the author's field studies: aspenfirspruce. The forest inventory data analysis confirmed the conclusions about the height of spruce and fir trees at cutting when they may compete with aspen.