Characteristics Of The Growth Response Of Astragalus Adsurgens Under Different Position Illumination Of PV Plate

The advantages of building photovoltaic power station in desert area are prominent,the space in power station is used reasonably and efficiently,and planting suitable sand vegetation is an effective measure to prevent sand and control sand.This paper selected the ecological photovoltaic test area of Yili Kubuqi Desert which is located at Dugui Tara town in Hangjin Banner,Ordos City,Inner Mongolia,studied the growth pattern and physiology of Astragalus adsurgens Pall at the front of the plate(which named A),the back of the plate(which named B)and under the plate(which named C)of the fixed array plate,and evaluated the adaptability of Astragalus adsurgens Pall to the interference of photovoltaic plate by membership function analysis,which provided reference for vegetation restoration in desert photovoltaic area.The main conclusions are as follows:(1)In the growing season of May-September,the height of Astragalus adsurgens Pall plant in the subplate position increased by 78.49%,30.70%,87.50%,99.97%and 75.81%respectively compared with the control CK.The fresh weight of aboveground biomass in the shaded area was larger than that in the control area,and the control CK decreased by 76.29%,46.67%and 58.35%respectively.(2)The leaf area increased by 30.73%,35.71%,22.53%,115.63%and 40.81%,respectively,compared with the control CK.The leaf showed a trend of thinning and expanding,Astragalus adsurgens Pall showed typical adaptation to low-light photovoltaic shade environment(3)The interference of photovoltaic panels was beneficial to the photosynthetic pigment of Astragalus adsurgens Pall,and its total chlorophyll content was significantly higher than that of the control area(p<0.05),the subplate position increased by 7.17%,74.40%,37.41%,65.29%and 64.76%respectively from May to September.And chlorophyll a/b decreased gradually with the increase of shading time,the subplate position decreased by 10.22%,12.47%,13.86%,28.33%and 28.19%compared with the control CK,respectively,which increased the utilization rate of light energy in Astragalus adsurgens Pall;the content of soluble protein increased under shading condition;and the content MDA shading position was not different from that of control,indicating that the blocking effect of photovoltaic panels did not cause harm to Astragalus adsurgens Pall.(4)The interference of photovoltaic panels was beneficial to the accumulation of mineral elements of Astragalus adsurgens Pall,in which the N content of CK decreased by 43.62%,59.89%,76.92%,10.65%and 10.43%respectively compared with the subplate position;P content decreased by 52.70%,28.24%and 24.74%compared with the subplate position in the control CK in July-September.