Change Of Soil Particle Composition And Carbon Distribution In Photovoltaic Power Station

With the consumption of non-renewable energy,photovoltaic power plants has increased.The construction of photovoltaic power plants have a certain impact on the soil,so relevant departments have paid more attention to vegetation restoration of photovoltaic power plants.In order to understand the impact of vegetation restoration on soil fertility,this study took Inner Mongolia Shanlu Energy Group Dayou Solar Energy Agricultural and Animal Husbandry Demonstration Base as the research object.Three different vegetation types(astragalus,alfalfa,and Pinus sylvestris)and three differences Location among photovoltaic panels(front eaves,between rows,back eaves)were selected,the soil particle composition and carbon distribution rules would be explored,which provided data support for the vegetation restoration research of photovoltaic power plants.The main results were as follows:1.The characteristics of soil particle composition were sand particles> powder particles> clay particles.The particle content of different vegetation types were Astragalus > Mongolica > Alfalfa,and the front eaves> between rows> rear eaves.The proportion of characteristic micro-aggregates were alfalfa > pinus sylvestris >astragalus,and the positions were back eaves>between rows>front eaves,indicating that the alfalfa plot had the highest content of large-grain micro-aggregates in the front eaves.2.In the 10-20 cm and 20-40 cm soil layers,the soil organic carbon content and the organic carbon density of the alfalfa were significantly greater than those of the Pinus sylvestris and astragalus plots.In the 10-20 cm soil layer,the organic carbon content between rows were significantly greater than that of the front eaves and Back eaves.Different soil layers had the highest organic carbon content in the surface soil.The organic carbon density had the largest change in the front eaves,and the lower soil of 20-40 cm were significantly greater than the upper soil of 0-10 cm and 10-20 cm.3.The content of organic carbon among different vegetations was that <0.05 mm particle size had the highest organic carbon content,and the 2-0.25 mm particle size had the lowest organic carbon content.Among photovoltaic panels,the organic carbon content of<0.05 mm and >2mm were the highest,and the difference between the different soil layers of <0.05 mm and the rows was the largest.The contribution rate of each grain fraction to soil organic carbon was mainly the two grain fractions of 0.25-0.05 mm and <0.05 mm with the highest contribution rate,and the cumulative contribution rate was 78.53 %.The contribution rate of aggregates with 0.25-0.05 mm in the front eaves of the alfalfa plot was the largest.