Study on parameters optimization of unmanned aerial vehicle and ecological remediation of buckwheat stained with DSE

The complex and changeable terrain, subsidence topography and land fissures of mining area in northern Shaanxi make it difficult for mechanical restoration of ecological environment. Based on M8A20A eight-rotor UAV platform, this study investigated the effects of the optimal parameters on aerial seeding, and the ecological restoration of buckwheat by DSE infection and aerial seeding. Results showed that the flight parameters had significant effects on the available width and uniformity of buckwheat seeds. The optimal parameters of aerial seeding includehigh speed, flight height of 2.5 m, flight speed of 4.0 m/s and operating distance of 6.0 m. Compared with the control group, plant height, ground diameter and above-ground biomass of the buckwheat infected with Dark Septate Endophytes(DSE)increased by 11%、25%、49%, respectively. In addition, the DSE infection could increase the SPADR and photosynthetic rate of buckwheat, promoting the root to grow and improving the yield and quality of buckwheat. This UAV aerial seeding combined with growth promotion of DSE infection could offer reference for ecological restoration of complex terrain in the western mining areas.