紫花苜蓿对DDT污染土壤的修复

Phytoremediation of DDT-Contaminated Soil by Medicago sativa

研究了豆科植物紫花苜蓿(Medicago sativa)对DDT污染土壤的修复情况.在修复性盆栽实验中添加复合肥肥料、植物根际促生菌X1巴氏葡萄球菌(Staphylococcus pasteuri)和植物根际促生菌X2根癌农杆菌(Agrobacterium tumefaciens)作为调控措施.结果显示,紫花苜蓿在同时添加植物根际促生菌X1巴氏葡萄球菌(10.0mL)和植物根际促生菌X2根癌农杆菌(10.0mL)作为调控措施的情况下,植物的去除能力最强,去除率可达58.71%;且该实验组植物长势良好,生物量可观,植物体内DDT残留量不高.在权衡各方面因素下,紫花苜蓿和两种植物促生菌X1巴氏葡萄球菌和植物根际促生菌X2根癌农杆菌被认为是效果最好的植物和调控措施组合.

Phytoremediation of DDT-contaminated soil by Medicago sativa is studied. Compound fertilizer, Staphylococcus pasteuri, Agrobacteriurn turnefaciens are taken as adjustment measures. The results show that the best combination of plant and adjustment measures is Medicago sativa with Staphylococcus pasteuri （10.0 mL） and Agrobacterium tumefaciens （10.0 mL）, and the removal rate of the best combination could reach up to 58. 71%. Because of the strong removal capacity, the vigorous growth, the tremendous biomass and the nethermore residual quantity, Medicago sativa with Staphylococcus pasteuri and Agrobacteriurn turnefaciens can be used as the best combination.