Effects of large-scale photovoltaic power stations on vegetation and soil in alpine sandy land in the northeastern margin of Qinghai-Tibet Plateau:A case study of Gonghe Basin in Qinghai Province
The study on the long-term effects of different types of solar photovoltaic panels on vegetation soil in high-altitude desert areas has important guiding significance for the operation and maintenance of large-scale photovoltaic projects in the desert region.Taking the photovoltaic power station in the Republican Basin as the research object,through a vegetation field survey and soil test analysis,it was found that:Ten years after the completion of the photovoltaic power station,the number of plant species increased from 21 to 32.However,the diversity of the plants growing under the panels decreased,but the density of the dominant species exhibited an increase,while the opposite was observed in the area between the panels.Concurrently,the soil nutrients within the power station demonstrated superior quality in comparison to those outside the station.Additionally,the soil nutrients within the power station were observed to be superior to those in the surrounding area,with those beneath the panels exhibiting the greatest improvement.The flat uniaxial subarrays also demonstrated more favourable outcomes compared to other subarray types.The comparative analysis of different types of photovoltaic panels,photovoltaic areas and wilderness showed that sunlight exposure had a positive impact on plant community evolution,and the shading of photovoltaic panels inhibited the development of plant diversity.The construction of photovoltaic power stations has a significant impact on the distribution of soil factors,which in turn affects the distribution of vegetation.Among the soil factors that play a crucial role in determining the distribution of vegetation in the station are hydrolysable nitrogen,total nitrogen,pH.In addition,the photovoltaic power station has a significant cooling effect on the soil.In the time scale of day and month,the cold environment can lead to the decrease of soil temperature in the power station.After 6 years,the soil in the power station has a drying trend,and the drying trend in deep soil is more significant.
photovoltaic power stationsoil nutrientssoil temperaturesoil moisturevegetation
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