Abstract: To provide theoretical basis for the remediation application of Saccharum arundinaceum Retz.in heavy metal combined polluted soil,a pot experiment with cultivated Saccharum arundinaceum Retz.was conducted, and the growth responses, heavy metal accumulation and transfer characteristics of Saccharum arundinaceum Retz.under combined pollution of Cd, Zn, Pb, Cu were observed.With the increasing of soil combined pollution of Cd,Zn,Pb,Cu,the fresh weight in the upper part of Saccharum arundinaceum Retz.gradually decreased,and the maximum decrease rate was 26.71%.The content of Cd,Zn,Pb,Cu in roots,stems and leaves of Saccharum arundinaceum Retz. was obviously increased,the maximum contents of Cd,Zn,Pb,Cu in root were 104.4,2 486.0,379.7,1 457.3 mg/kg,respectively,the maximum contents of Cd,Zn,Pb and Cu in stem were 32.3,1 461.7,77.6,25.3 mg/kg,respectively,and the maximum contents of Cd,Zn,Pb,Cu in leaf were 13. 6,488. 5,21. 7,43. 5 mg/kg,respectively.Except the control,the concentration factors of Cd,Zn,Pb,Cu in stems at the same treatment level were shown as Zn>Cd>Pb>Cu,and Cd>Zn>Cu>Pb in leaves.With the increasing of soil combined pollution of Cd,Zn, Pb, Cu, the translocation factor of Cd, Zn, Pb, Cu in stems gradually decreased, while the translocation factor of Cd and Zn in leaves gradually increased,and the translocation factor of Pb and Cu in leaves increased firstly and then decreased.Overall,Saccharum arundinaceum Retz.has a good ability to absorb and accumulate Cd and Zn,and can be used as a repair plant for Cd and Zn contaminated soil.

Key words: Saccharum arundinaceum Retz., Heavy metal, Combined pollution, Absorption, Enrichment, Cd, Zn, Pb, Cu

摘要： 采用桶栽试验的方法，以斑茅（Saccharum arundinaceum Retz.）为材料，研究不同重金属复合污染条件下斑茅的生长响应及重金属吸收、富集和迁移特征变化，为斑茅在重金属复合污染土壤中的修复应用提供理论依据。结果表明，随着复合污染土壤中重金属含量的增加，斑茅地上部鲜质量逐渐下降，最多较对照（不添加重金属）下降26.71%; 斑茅根、茎、叶组织中的Cd、Zn、Pb、Cu含量也逐渐增加，其根部Cd、Zn、Pb、Cu的最大含量分别为104.4、2 486.0、379.7、1 457.3 mg/kg，其茎部Cd、Zn、Pb、Cu的最大含量分别为32.3、1 461.7、77.6、25.3 mg/kg，其叶部Cd、Zn、Pb、Cu的最大含量分别为13.6、488.5、21.7、43.5 mg/kg；除对照外，同一处理水平Cd、Zn、Pb、Cu在斑茅中的富集系数表现为茎部Zn>Cd>Pb>Cu，叶部Cd>Zn>Cu>Pb；随着复合污染土壤中重金属含量的增加，斑茅茎部Cd、Zn、Pb、Cu的转移系数逐渐减小，而叶部Cd、Zn的转移系数逐渐增大，叶部Pb和Cu的转移系数先增大后减小。综合考虑，斑茅对Cd、Zn具有较好的吸收累积及转运能力，可作为Cd、Zn污染土壤的修复植物。

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