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作 者 ：刘霞,刘树庆,唐兆宏

期 刊 ：生态学报 2002年 22卷 10期 页码：1688~1694

关键词：潮土；潮褐土；铅；镉；形态；油菜；

Keywords:alluvial meadow soil, cinnamon soil, cadmium, lead, form, rape,

摘 要 ：当今土壤重金属污染日趋严重而表征土壤污染程度的指标不够完善、相关性亦较差。为此 ,采用网室盆栽试验 ,研究了河北平原主要土壤类型潮土和潮褐土上 Cd、Pb的化学形态特征及其与油菜植株干物重、油菜吸收重金属含量的关系。结果表明 Cd对油菜的毒害作用大于 Pb。总量及各形态 Cd、Pb含量与油菜可食部分干物重呈负相关 ,对油菜干物重影响最大的是交换态 Cd、Pb。而对油菜吸收 Cd、Pb贡献最大的形态是碳酸盐结合态和铁锰氧化物结合态。深入研究重金属形态与植物有效性间的关系 ,可为进一步揭示重金属的生物有效性 ,为更准确评价土壤重金属污染程度提供理论依据 ,具有重要的理论意义和实际应用价值。

Abstract:Today, the problem of environmental pollution is becoming more and more serious. Specially, contamination of heavy metal has received increased attention with regard to their accumulation in soils and their potential to permanently damage plants, animals, and microorganisms. The effect of heavy metals on soil ecology is not controlled by their total amount; rather, it is determined by their chemical forms. Many studies have showed that the main form of heavy metals in soil that can be taken up by plants is...

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