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《Journal of Soil and Water Conservation》 2018-03
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Effects of Phosphate Fertilizer on Phytoremediation of Chlorophytum comosum and Soil Enzyme Activity in Cd-contaminated Soils

PAN Fanghui;ZHANG Xiaowei;WANG Youbao;College of Life Sciences,Anhui Normal University;Anhui Key Laboratory of Biotic Environment and Ecological Safety,Anhui Normal University;  
The effect of phosphate fertilization on the growth of Chlorophytum comosum and soil enzyme activities in Cd-contaminated soils were investigated.The results showed that C.comosum was able to grow well in Cd-contaminated soils contained 100 mg/kg Cd.The appropriate addition of P fertilization was capable of distinctly improving chlorophyll content,cell membrane permeability and antioxidase activities of C.comosum(p0.01).The chlorophyll content,cell membrane permeability and antioxidase activities of C.comosum were promoted by low P level fertilization and inhibited by high P level fertilization.Both the chlorophyll content and the CAT activity increased to the maximum at 200 mg/kg of P.Election Conductivity and MDA content dropped to the minimum value at the same time.The POD activity started to rise when the P content were at 200 mg/kg.The results indicated that P addition could reduce the degree of damage to the cell membrane to the lowest level,and significantly enhance antioxidation.Simultaneously,the soil enzyme system in Cd-contaminated soils could also be improved by using phosphate fertilizer.The activities of catalase and urease were enhanced at low P content while they were decreased at high P content.The urease activity showed the opposite trend of the catalase and urease activities.The phosphatase activity was inhibited.Besides,the activities of catalase and urease were elevated to the maximum values while the sucrase activity was decreased to the minimum value at 200 mg/kg of P content.Moreover,the four soil enzyme were highly correlated with P concentration(p0.05)and the correlation sequence of the four soil enzymes was urease catalase sucrose phosphatase.
【Fund】: 国家自然科学基金项目(31070401);; 安徽省高校自然科学基金重大项目;; 重要生物资源保护与利用研究安徽省重点实验室基金资助项目
【CateGory Index】: X173;X53
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