有机酸对水稻镉吸收的影响  

Effect of Organic Acids on Cadmium Uptake in Rice Plant.

作　　者：张敬锁 李花粉[2] 衣纯真[2] 

机构地区：[1]北京市农业环境监测站,100029 [2]中国农业大学资源与环境学院,北京100094

出　　处：《农业环境保护》1999年第6期278-280,共3页Agro-Environmental Protection

摘　　要：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。Organic acids (EDTA, citrate and malate acids) added into soil during rice flowering, to study the effects of organic acids on Cadmium uptake of rice in past reproduction, especially on Cadmium content in rice grains. The results indicated that EDTA added into soil could decrease Cadmium content in rice grain significantly, but citrate and malate acids affected Cadmium content in rice grains insignificantly. In addition, organic acids would affect Cadmium accumulation in rice root and EDTA could decrease cadmium content significantly in rice root.

关 键 词：镉 有机酸 水稻 EDTA 植物监测 

分 类 号：X835[环境科学与工程—环境工程]