棚膜管理对避雨设施葡萄园土壤酸化的影响OA

Sampling was conducted to investigate the basic physical and chemical properties and acidification characteristics of vineyard soil under the management of full-year facility film mulching and open-air film removal during the dormant period.The results showed that the soil acidification phenomenon in vineyards is more serious under facility mulching management.Compared with open-air film removal management,facility film covering management reduces the soil pH value by 0.4,lowers the organic matter content by 12%,and increases the exchangeable H+content by 32%.Constrained by the leaching effect,the acid buffering capacity and the content of base ions(Ca2+,Mg2+,K+and Na+)in the film-peeling management are both lower than those in the film-covering management.Relevant analysis indicates that there is an extremely significant negative correlation between the pH value of vineyard soil and exchangeable acid,H+,and Al3+,with correlation coefficients of-0.83,-0.78 and-0.76 respectively.The pH value of vineyard soil is more dependent on the content of H+in exchangeable acids.To mitigate soil acidification and increase soil pH of vineyards in southern regions,facility mulched vineyards should adopt film stripping treatment during the dormant period.