Influence Of Different Vegetation Restoration Measures Of Pv Power Station In Sandy Area On Soil Physical And Chemical Properties

The sandy area is an ideal place for the construction of photovoltaic power stations.The wind and sand environment in the sandy area greatly affects the stable operation of photovoltaic power stations.Vegetation measures are effective measures for the ecological restoration of photovoltaic power stations.In order to reveal the response mechanism of the sandy soil under different vegetation restoration measures of photovoltaic power stations in the sandy area,this thesis takes the photovoltaic power station in Duguitala Town in the Kubuqi Desert as the research object,and measures the Leymus chinensis,licorice,artemisia ordosica,flower sticks and paved reed sand.The typical physical and chemical properties of soil particle characteristics,soil water holding capacity,and soil nutrients of the barrier sample plots were analyzed,and the evolution characteristics of aeolian sandy soil quality under different vegetation restoration measures were analyzed.The main conclusions obtained are as follows。（1）The soil in the study area is dominated by fine sand.The fine sand content of the five measures increased significantly compared with the control.Among them,the reed sand barrier measure increased the most,reaching 38.29%,the Artemisia ordosica measure was the second,and the licorice measure was the lowest;The sand content in the soil was significantly lower than the control.The effect of vegetation on reducing dust and sand,promotes the gradual refinement of soil particles,while the sand barrier measures of reeds have a more obvious effect on the refinement of soil particles.（2）The soil bulk density of the 5 planting restoration measures was lower than the control,and the capillary porosity was higher than that of the control.Among them,the soil bulk density of the Leymus chinensis measure was the lowest(1.50 g·cm^-3),which was only 0.91 times that of the control;The soil capillary porosity of the sand barrier measures is the highest（30.83%）,which is 2.18 times that of the control.The soil natural moisture content of Leymus chinensis,licorice,Artemisia ordosica and flower stick measures is lower than that of mobile sandy land,and saturated moisture content,capillary moisture content and field moisture content are all higher than that of mobile sandy land;while the soil natural water content of reed sand barrier measures The water content rate,saturated water content,capillary water content and field water content all increased compared with mobile sandy land,and the increase was the largest.Vegetation restoration can improve soil water retention capacity and restore soil water storage function,among which reed sand barriers have the most obvious effect on soil water retention.（3）The soil organic matter and available nutrients of 5 planting restoration measures were higher than the control,and showed a decreasing trend with the increase of soil depth.The licorice measure had the highest soil organic matter content(4.70g·kg^-1),which was 3.41 times that of the control;the flower stick measure had the highest soil available nitrogen and available phosphorus content(13.64 mg·kg^-1,17.00 mg·kg^-1),which were 6.31 times the control,1.57 times;Leymus chinensis has the highest available potassium content(22.63 mg·kg^-1),which is 5.09 times that of the control.（4）Comprehensive analysis shows that the reed sand barrier measures have a significant effect on the physical properties of the soil in the study area,making the soil particles more refined and water holding capacity better.Vegetation restoration measures can increase soil organic matter and available nutrient content,among which licorice,flower sticks and Leymus chinensis have obvious effects.