ANALYSIS OF GROWTH AND STATE OF PEDUNCULATE OAK AND BLACK ALDER WHEN CONDUCTING BIOLOGICAL RECLAMATION OF DISTURBED LANDS IN THE MIDDLE VOLGA REGION
The paper analyzes the growth indexes in height and diameter of pedunculate oak and black alder, created on building-refuse dumps in the Republic of Mari El. On the stage of technical reclamation a piece of dump was leveled by a tractor T-130 with a dozer blade; a fertile soil layer of thickness of 15 cm was added simultaneously. Soil treatment was done by a forestry double-breasted plough PL-1 aggregated with a tractor TDT-55. The planting was manual for the Kolesov sword according to the scheme of 3.0 x 0.75 m in the spring of 2000. Perennial lupine was planted to improve soil fertility on the recultivated plot. Also black alder was introduced in this object as a soil-improving breed. Our studies revealed that on the stage of biological reclamation a lupine perennial has a positive impact on the growth of oak cultures. The influence of black alder on the growth of oaks at this stage was not proved.