通过盆栽试验， 在水稻开花期向土壤添加有机酸类物质， 研究有机酸对水稻吸收镉的影响， 特别是对水稻籽粒中镉含量的影响。结果表明， 添加乙二胺四乙酸（ＥＤＴＡ） 处理可明显抑制水稻对镉的吸收，即水稻籽粒中镉含量明显降低；而用柠檬酸和苹果酸处理时，对水稻籽粒中镉含量影响不大。添加外源有机酸后，可以影响镉在根中的累积，而且ＥＤＴＡ 明显地降低了根中镉的含量。 Pot experiments were carried out to study the effects of organic acids on cadmium uptake by rice plants, especially on the cadmium content in rice grains. The results showed that the addition of ethylenediaminetetraacetic acid (EDTA) significantly inhibited the absorption of cadmium by rice, that is, the content of cadmium in rice grain was significantly reduced. However, the treatment with citric acid and malic acid had little effect on the content of cadmium in rice grain . Adding exogenous organic acids can affect the accumulation of cadmium in the roots, and EDTA significantly reduced the content of cadmium in the roots.