Stabilization of quarry ground by sowing perennial grasses in the conditions of Nenets autonomous okrug

The article deals with the issues of stabilization of quarry ground by sowing perennial grasses there. After the termination of exploration, quarries become desert areas without vegetation cover. In geobotanical zoning, the quarries we consider belong to the southern shrub subarctic tundra zone. Engineering-biological activities aimed at artificial restoration of tundra ecosystems are carried out on the principle of restoration of the ecosystem as close to the natural one as possible. The technology of biological recultivation of disturbed lands provides for the creation of sustainable vegetation by sowing perennial grasses adapted to Subarctic conditions, applying mineral fertilizers, and planting willow cuttings in places of development of erosion processes. It is found that in the course of recovery of vegetation on disturbed tundra lands of Nenets Autonomous Okrug, the mixtures of perennial grasses, consisting of meadow fescue (Festuca pratensis), red fescue (Festuca rubra) and timothy grass (Phleum pretense) are successfully used. The optimum seeding rate is 40 kg/ha, the dose of fertilizer is N20P40K40, higher doses result in a greater number of sprouts, but lead to additional economic costs. Quarries are covered with vegetation the next year after sowing; the sown grasses form the gramineous community, which reaches the tillering phase, and individual plants - the earing phase. In the second year, cereals continue to develop, and representatives of the local flora appear in the herbage. The aim of the work was to stabilize the soils of the quarry in the Nenets Autonomous Okrug by sowing perennial grasses. The novelty of the research consists in the fact that it establishes economically justified norms for sowing grass seeds and applying mineral fertilizers to restore vegetation cover on disturbed tundra lands during the implementation of reclamation measures. Practical significance of the research results lies in the possibility of using the results obtained in the restoration of disturbed tundra lands and their return to agricultural turnover.