【摘要】 针对提高植物修复土壤重金属污染的效果,以印度芥菜作为重金属富集植物,通过盆栽试验研究了巨大芽胞杆菌和胶质芽胞杆菌的混合微生物制剂(A处理)和黑曲霉发酵液(B处理)对植物修复Cd、Pb、Zn污染土壤的作用效果。结果表明:巨大芽胞杆菌和胶质芽胞杆菌的混合微生物制剂,不仅可以促进富集植物的生长,使其印度芥菜的生物量提高24.73%,并且可促进土壤Cd、Pb、Zn的活化,使土壤Cd、Pb、Zn有效态含量分别提高15.02%、7.65%和2.23%,增强富集植物对土壤的Cd、Pb、Zn富集吸收,使印度芥菜对土壤Cd、Pb、Zn的提取量分别提高52%、121%和23%,显著提高其植物修复效果。从对植物生理生化指标的影响来看,A处理对植株的伤害程度要低于B处理,它是一种有助于植物修复Cd、Pb、Zn污染土壤的微生物制剂,在植物修复领域有较高的利用价值。然而,黑曲霉混合发酵液不适于促进植物修复应用。更多还原

【Abstract】 Aiming at improving phytoremediation of Cd-,Pb-and Zn-contaminated soil,a pot experiment was carried out using Brassica juncea as a hyperaccumulator to explore effects of Bacillusme gaterium and Bacillus mucilaginosus compound (Treatment A) and Aspergillus niger ferment (Treatment B) on phytoremediation of Cd-,Pb-and Zn-contaminated soil. Results show that Treatment A not only promoted growth of the hyperaccumulator by 24.73%,but also helped improve availability of Cd,Pb and Zn in the soil by 15.02%,7.65% and 2.23%,respectively,thus increasing Cd,Pb and Zn uptake by 52%,121% and 23%,respectively,and eventually improving significantly the effect of phytoremediation. In light of their effects on physiological and bio-chemical indexes (SOD,POD and CAT),Treatment A was less harmful than Treatment B to the hyperaccumulator. So the microbial compound in Treatment A is an effective one that has a high value in use in the field of phytoremediation of contaminated soils. However,Aspergillus niger ferment is not suitable for the phytoremediation of contaminated soils.更多还原