菰对南洞庭湖湿地土壤中Cu、Sb、Cd、Pb的吸收与富集

摘要/Abstract

摘要： 采集南洞庭湖生长的优势种菰(Zizania latifolia)及其根际土壤样品。分析菰对土壤中Cu、Sb、Cd、Pb 四种重金属的吸收与富集。结果表明：南洞庭湖土壤中四种重金属污染情况是Sb > Cd > Cu，Pb 未超标。在这四种重金属污染条件下，植株不同部位对Sb 均无富集作用，对其他三种重金属元素的吸收积累能力均是根 > 叶 > 茎；不同采样区菰对重金属的富集能力存在明显差异，四季红2 区菰根中Cu 的富集系数显著性高于其它六个采样区(P < 0.05)，卤马湖2 区与四季红2 区菰根中重金属Cd 之间没有显著性差异(P > 0.05)，但显著性高于其它五个采样区(P < 0.05)。因此，菰对南洞庭湖重金属Cd、Cu 污染具有较好的的修复作用。

关键词: 蔬菜, 蔬菜, 营养成分, 评价

Abstract: To study the regulations on absorption and accumulation of heavy metals in Zizania latifolia.　we had collected some specimens of the dominant species of Z. latifolia which live in heavy metal polluted area of the South of Dongting Lake and its rhizosphere soil，then we analysised the content of Cu，Sb，Cd，Pb in them.　Results showed that the pollution level in soil was Sb > Cd > Cu，but the content of Pb did not exceed the stipulated standards.　Living in these heavy metal polluted soils，each part of Z. latifolia had no enrichment of Sb.　However，the ability of absorption and accumulation of other three kinds of heavy metals was root > leaf > stem.　 For different areas of the South Dongting Lake，acumulation ability of heavy metals in Z. latifolia was different.　In Xi Jihong2 area, the enrichment factor of Cu in roots of Z. latifolia was significantly higher than that of other six areas (P <0.05).　The enrichment factor of Cu in roots of Z. latifolia which live in Lu Mahu2 area and those of Z. latifolia which live in Xi Jihong2 area had no significant differences(P> 0.05)，but their enrichment factor both were significantly higher that of other five areas (P <0.05).　As a result，Z. latifolia has good prospect of application for remediating the region of the heavy metal pollution in the South Dongting Lake.

彭晓赟,赵运林,雷存喜,戴枚斌,易合成. 菰对南洞庭湖湿地土壤中Cu、Sb、Cd、Pb的吸收与富集[J]. 中国农学通报, 2009, 25(13): 206-210.

Peng Xiaoyun, Zhao Yunlin, Lei Cunxi, Dai Meibin, Yi Hecheng. Absorption and Accumulation of Cu、Sb、Cd、Pb in wetland soils by Zizania latifolia from the South Dongting Lake[J]. Chinese Agricultural Science Bulletin, 2009, 25(13): 206-210.

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