Change of breeds in the field-protective forest belts of the Republic of Bashkortostan

The dynamics of the change of rocks in the poplar protective forest belt growing next to the forest crops of the Scotch pine is analyzed. A forest belt 450 m long and 10 m wide grows near the village of Shigaikulbash in the Buzdyaksky district of the Republic of Bashkortostan. Accounting sites are laid every 50 m. Reliable pine undergrowth grows in the forest belt, poplar undergrowth was not found on any of the accounting areas. Characteristics of pine undergrowth (density, average age, height, diameter) and the condition of poplar trees were compared for 2008 and 2020. It was revealed that there was a change in the design of the forest belt from openwork to dense, there is a partial shrinkage of poplar, in some areas there is an exit of pine undergrowth to the first tier. For both periods, the highest density of pine (over 1.5 thousand units/ha) was detected at a distance of up to 200 meters from pine forest crops, the lowest density (no more than 0.4 thousand units/ha) - in the center of the forest belt. In 2020, the category of small undergrowth was not found, most of it is large undergrowth, some of which have entered the reproductive phase. A similar pattern is observed in neighboring forest belts, which allows us to draw conclusions about the possibility of changing the species of protective forest strips, which should be accompanied by logging.