The Influence Of Photovoltaic Power Station On Allelopathy Of Typical Grassland Degradation Indicator Plant

Steppe and desert are the main sites for constructing photovoltaic power stations in the north of China,The influence of photovoltaic power stations on ecological environment surrounded is gradually concerned by the crowd.In this paper,Xilingol League Zhenglanqi photovoltaic power station was selected as the experimental area to study the allelopathy of the degradation indicator plants Stellera chamaejasme,Artemisia frigida and Potentilla acaulis living inside and outside of the photovoltaic power station.We analyzed the inflience mechanism of extract liquids from the above 3 plants on seed germination and seedling growth of Medicago sativa,Elymus dahuricus and Agropyron cristatum.The main conclusions are as follows:1.The low-concentration extracts of Stellera chamaejasme has promoted seed germinations of Medicago saliva,while its high-concentration extracts has the corresponding inhibited effects.However,the extracts of Stellera chamaejasme living in photovoltaic power station only have inhibited effects on 3 receptor plant.The inhibition effect of Artemisiaf rigida extracts on seed germinations in photovoltaic power station was enhanced compared with that out photovoltaic power station,which increased by 0.01 and 0.03,respectively.The extracts of Potentilla acaulis in photovoltaic power station has the effect of low concentration promotion and high concentration inhibition on seed germination rate of Medicago sativa and Elymus dahuricus.2.The results showed that the extracts of Stellera chamaejasme outside photovoltaic power station inhibited the seedlin gs growth of Medicago sativa,Elymus dahuricus and Agropyron cristatum,While the inhibition effects of Stellera chamaejasme inside photovoltaic power station on seedlings growth were weakened regarding Medicago sativa and Agropyron cristatum,and they were promoted(SE=0.07)regarding Elymus dahuricus.Low-concentration extract(?25 g·L-1 of Artemisia frigida outside of photovoltaic p ower station had promoting effects on Medicago sativa seedling growth,while its high-concentration extracts(? 50 g·L-1)has the corresponding inhibited effects.However,the extract of Agropyron cristatum,from the photovoltaic power station has stably inhibited the growth of Medicago sativa seedlings.3.The difference index of allelopathic intensity of Medicago sativa,Elymus dahuricus and Agropyron cristatum was-0.072,-0.007 and-0.077.The photovoltaic power station reduced the allelopathic effects of Stellera chamaejasme,Artemisia frigida and Potentilla acaulis,The order of weakening intensity was:Potentilla acaulis>Stellera chamaejasme>Artemisia frigida.4.The allopathic intensity of 3 donor plants in photovoltaic power station were weakened on 3 receptor plants.The order of the weakening intensity on 3 receptor plants was:Medicago sativa>Elymus dahuricus>Agropyron cristatum.As the allopathic intensities of 3 donor plants on Medicago sativa were weakened most.Medicago sativa was suggested to be replanted on bare ground in photovoltaic power station and between photovoltaic panels.