中文摘要：

选用观赏植物吊兰进行盆栽实验，研究了土壤重金属镉、锌、铅复合污染对土壤酶活性、土壤化学性质、有效态重金属以及吊兰对土壤重金属镉、锌、铅复合污染的修复作用。结果说明：镉、锌、铅复合污染条件下，镉、锌协同抑制土壤过氧化氢酶活性，而一定浓度的铅能促进土壤过氧化氢酶活性。对于磷酸酶活性，镉、锌和铅之间产生拮抗作用。蔗糖酶和脲酶的活性随着镉、锌、铅各浓度的增加而下降。镉、锌、铅复合污染对土壤酶活性的抑制顺序为镉〉锌〉铅。实验组土壤酶活性显著高于对照组的土壤酶活性。土壤的pH、还原电位随着镉、锌、铅浓度的提高而增大，土壤的有机质含量则与土壤重金属镉、锌、铅的浓度关系不大，保持相对稳定。由于吊兰的影响作用，实验组土壤的有效态重金属含量较低，且与对照组之间存在极显著的差异。总之，吊兰对土壤重金属镉、锌、铅复合污染有明显的修复效果，吊兰在重金属污染修复方面有广阔的应用前景。

英文摘要：

Effect of Cd, Zn, Pb combined pollution on soil enzyme activities, chemical properties, available concentration of the heavy metals in soil and the repairing effect of soil with Cd, Zn and Pb combined pollution by Chlorophytum comosum were researched by using pot experiment. The results showed that Cd and Zn collectively inhibited catalase activity of soil while Pb advanced catalase activity in the condition of Cd, Zn and Pb combined pollution. The compound pollution of Cd, Zn and Pb on phosphatase activity exhibited protective effect. The activities of invertase and urease were all reduced with the increasing concentration of Cd, Zn and Pb. The inhibiting effect of the three heavy metals on soil enzymes had a toxicity order： Cd 〉 Zn 〉 Pb. The soil enzyme activity of experimental groups was significantly higher than that of control groups. The values of pH and oxidation reduction potential （ORP） were all increased with the increasing concentration of Cd, Zn and Pb. The Organic matter have less to do with the concentration of heavy metals, it did not changed experimental groups was significantly lower than conclusion, C. comosum has obviously effect in application prospects in remediating soil of Cd, Zn