地肤对大棚菜田土壤重金属的修复效应研究

Research of Remediation Effect of Kochia scoparia on Heavy Metal Contaminated Vegetable Field Soil in Plastic Shed

为了探讨地肤对大棚菜田土壤重金属的植物修复效应,采集不同种植年限(0、5、10、15、20、25、30年)大棚菜田土壤样品,以地肤为研究对象,研究地肤种植对不同种植年限土壤中重金属Zn、Cu、Mn、Pb、Cd污染的修复效应以及吸收积累特性。结果表明:地肤对大棚菜田土壤重金属的修复效率大小顺序依次为Zn>Pb>Cu>Mn>Cd,其修复效率分别为25.66%、25.64%、21.11%、15.02%、9.78%。地肤对大棚菜田土壤重金属Zn、Pb积累特性表现为根<茎<叶,而对重金属Cu、Mn、Cd则表现为根>茎>叶。该试验为大棚菜田重金属污染土壤植物修复和可持续利用提供了理论依据和技术支持。

In order to discuss phytoremediation effect plastic-protected vegetable fields, the soil samples were of Kochia scoparia on heavy metal contaminatation in the collected from plastic-protected vegetable fields of different cultivating years （0, 5,10, 15,20,25,30 years）, and the remediation effect and accumulation characteristics of Kochia scoparia on Zn,Cu,Mn,Pb and CA of these soil samples were studied. The results showed that the remediation efficiency of Kochia scoparia on heavy metal-contaminated soil from the plastic-protected vegetable field was Zn〉Pb〉Cu〉Mn〉 Cd, and the remediation ratio was 25.66%, 25. 64%, 21.11%, 15. 02% and 9. 78%, respectively. Meanwhile, the accumulation characteristics of Zn and Pb of Koch ia scoparia was root〈stem〈leaf, and the accumulation characteristics of Cu,Mn and Cd was root 〉 stem 〉 leaf. The research conclusion would provide the theoretical basis and technical support for phytoremediation and sustainable utilization of heavy metal-contaminated vegetable field in plastic shed.