| The photovoltaic power plant directly destroys the local soil ecosystem and surface vegetation during the construction process.The department of environmental protection and engineering construction attach great importance to the impact of the photovoltaic power plant construction,and the landform,soil and vegetation must be carried out after completing the construction.Changes of soil nutrient were studied in different photovoltaic panel array(between column,front eaves,behind eaves)and different field(Leymus chinensis,Pinus sylvestris,Astragalus,and alfalfa fields)in Dayou Photovoltaic Agriculture experimental base of Shanlu Energy Group.Characteristics of soil physics,chemistry and enzyme activity were studied.The results were as follows:(1)The content of clay in the soil of Pinus sylvestris and Astragalus field was higher,the soil bulk density was the largest in alfalfa land,and the smallest in Pinus sylvestris field,and was 1.67 g/cm3 and 1.55g/cm3 respectively.The soil moisture showed a trend of between column>front eaves>behind eaves.(2)The organic matter,total nitrogen,alkali-decomposed nitrogen,total phosphorus,available phosphorus,and available potassium in the Leymus chinensis field were significantly higher than those in other lands.The organic matter and alkali-decomposed nitrogen in the behind eaves were significantly higher than those in other positions.The conductivity of Leymus chinensis field and behind eaves was relatively high.(3)The catalase content in the whole study area is between 0.62-0.66ml/g,and the urease content is between 1.38-1.65mg/g,The soil catalase and urease in Leymus chinensis field were significantly higher than those of other field.(4)The soil SQI indexes of Leymus chinensis,Pinus sylvestris,Astragalus and alfalfa land were 0.45,0.41,0.37 and 0.38 respectively.Soil fertility of Leymus chinensis field was the best,The quality of soil fertility of whole study area was moderate.So it is necessary to take reasonable measures to improve soil fertility. |
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