[目的]探讨重金属复合作用下水葫芦富集能力的变化情况。[方法]通过为期2个月的室内水培模拟试验研究水葫芦对重金属镉、铬长期富集效果。[结果]水葫芦有较强镉转运能力，叶片也是富集镉的主要部位，最高可达根含量的77％以上。水葫芦对铬转运能力较低，叶片铬含量仅为根的10％～22％。镉、铬复合作用下，铬对镉的表现为拮抗作用，尤其是在叶片中。相反，镉对铬的影响规律不明显，叶中低铬浓度下（1．00 mg／L）抑制铬积累，高铬浓度下（4．00 mg／L）则促进，而该2个浓度下对根均无显著影响，可能主要影响了铬的转运。[结论]水葫芦根系镉和铬最高含量可达6600 mg／kg和7300 mg／kg以上，表明其较强镉、铬污染修复能力在重金属污染水体修复上具有良好的应用价值。%Objective] The aim was to discuss the change of Eichhornia crassipes enrichment ability under heavy metal compound pollution. [Method] The indoor hydroponic experiment was carried to study the long term uptake and accumulation of Cd and Cr in E.crassipes in two months.[Result] The results showed that there was a strong Cd transport capacity in E.crassipes, and the leaf was also the main part of Cd accumulation, which could reach more than 77% of the content of the root.However, the Cr transport from root to leaf was low in E.cras-sipes, Cr content in leaves was only 10%-22%in that of the root.Cr showed a negative effect on Cd accumulation in E.crassipes, especially in the leaves.However, the effects of Cd on Cr accumulation was not obvious, Cd showed negative effect under low Cr concentrations (1.00 mg/L) and positive effect under high Cr concentrations (4.00 mg/L) on leaf Cr accumulation, but had no effect on root Cr content un-der these two concentration, it seems that Cd had mainly effected the transport capacity of Cr.[ Conclusion] The highest content of Cd and Cr in E.crassipes are more than 6 600 and 7 300 mg/kg respectively, which indicates that it has a strong ability on the remediation of Cd and Cr pollution, and has good application value in heavy metal polluted water restoration.
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