Subsequent reforestation at the sites of clear sanitary logging in the Republic of Tatarstan

Abstract

The purpose of the study is to identify the features of the subsequent reforestation of the main species at the sites of sanitary clear-cutting 3–10 years ago in the forestries of Arsky, Sabinsky (north-west of the Republic of Tatarstan) and Bugulminsk (southeast of Tatarstan). In all experimental areas, the total density of undergrowth of forestforming species in the fellings exceeds that under control. The occurrence of undergrowth on cuttings and on control is, as a rule, 80–100%, i. e. undergrowth is evenly distributed over the area. The fellings in the north-western part of the Republic are dominated by birch undergrowth with the participation of spruce and aspen, in the understory the shrub willow dominates. The total number of woody and shrubby plants amounted to 18–30 thousand copies / ha. In the Bugulma forestry, on richer soils, but with less moisture by precipitation, the undergrowth of maple and linden predominates on the fellings, hazel or rowan in the understory, in the total amount of 13–21 thousand copies / ha. The tendency to reduce the number of undergrowth on fellings in both parts of the Republic with the achievement of a density of undergrowth of 10 thousand copies / ha or more is revealed. On the fellings in the Arsk and Sabinsky forestries, the undergrowth of valuable tree species (spruce, birch, linden), as a rule, is present in sufficient quantities – 10–13 thousand copies / ha. Therefore, in most cases, in the fellings, you can limit yourself to carrying out clarifications to remove aspen impurities or thinning birch for better spruce growth. In the Bugulma forestry, the density of undergrowth of maple, or maple with linden is 7–9 thousand copies / ha. Here, apparently, it will be necessary to create curtain (group) oak crops, where the number of its seedlings is insufficient or uneven in area.