长春市郊区土壤-水稻体系重金属含量及迁移规律

对长春郊区部分水田土壤及水稻籽粒中重金属含量进行调查,采用单项污染指数法和综合污染指数(内梅罗指数)法对污染现状进行评价.Cd、Hg、As、Cu、Pb、Cr、Zn及Ni8种重金属的单项污染指数表明研究区域内土壤全部符合一般农田的标准,综合污染指数显示区域内土壤的重金属含量均未达到污染水平.水稻籽粒中Cd、Hg、As、Cu、Pb、Cr及Zn7种重金属的单项污染指数和综合污染指数结果均表明研究区域内水稻符合农产品食用标准.除了Hg、Pb和As以外,水稻籽粒中重金属Cu、Zn、Cd、Cr及Ni的含量与土壤中重金属Cu、Zn、Cd、Cr及Ni含量显著相关,表明这些元素较易从土壤向水稻植物体内迁移积累.

The Content and Migration Rule of Heavy Metals in the Soil-Rice System in Changchun Suburb

The pollution of heavy metals in the soil and rice from the suburb paddy field of Changchun were assessed using the single pollution index and the synthesis pollution(Nemerow index). The single pollution index of Cd,Hg,As,Cu,Pb,Cr,Zn and Ni in the research area showed that all sampling sites accorded with the standards of farmland product.The synthesis pollution index indicated that the content of heavy metals in the soils did not reach the level of soil pollution.The single pollution index and synthesis po...