The Impact Of Photovoltaic Power Construction On Soil And Vegetation In Jingbian County

As the construction of large-scale photovoltaic system in recent years, several problems were encountered. Environmental impact of photovoltaic plant are the most important aspect. In order to clarify the effect of photovoltaic plant on soil properties and vegetation communities, the soil and vegetation in Shaanxi Photovoltaic Power Company Limited in Jingbian County were investigated in 45 plots, which includes 3 different types(non-covered, covered and peripheral region). The impact of photovoltaic system on soil physical and chemical properties, plant species, species diversity, biomass and microclimate were studied by combining field investigation with laboratory experiment. The results showed that:(1) Compared with Peripheral region of photovoltaic plant, the moisture contents, organic matter, available phosphorus and potassium of topsoil(0-20cm) in photovoltaic plant were increased by 30-34%, 2.32-4.65%, 25.76-46.97%, 27.91-28.41%, respectively. While soil pH and conductivity were decreased by 1.25-6.65% and 34.24-60.82%, respectively. Soil bulk density has changed little. Compared with covered region in photovoltaic plant, soil moisture contents, pH, conductivity, available phosphorus and potassium of topsoil(0-20cm) in non-covered region were increased, however, Soil bulk density was decreased.(2) Compared with Peripheral region of photovoltaic plant, the plant species, Shannon-Wiener index, Pielou index, Simpson index, biomass of internal area were increased by 129-143%, 60.24-67.82%, 12.41-15.33%, 31.56-37.04%, 127-144%, respectively. Compared with covered region in photovoltaic plant, the plant species, Shannon-Wiener index, Pielou index, Simpson index and biomass in non-covered region increased.(3) Compared with peripheral area of photovoltaic plant, the wind speed, temperature and humidity of internal area were decreased by 23-43%, 26-32%, 34-39%, respectively.(4) Solar collector of Photovoltaic Plant improved Soil Fertility and adjusted soil pH and total salt content, Meanwhile enriched Species Diversity. Overall, Photovoltaic Plant is benefit for local Environment interm of Soil and Vegetation.