赣县沙地土壤-水稻重金属含量及迁移规律

Soil-rice heavy metal content and migration rule in ganxian sandy land

通过野外采样及室内样品测试分析,分析探讨了赣县沙地地区水稻及其根系土中8种重金属元素的含量特征及迁移规律。结果表明,水稻中8种重金属元素平均含量均未达到食品国家安全标准限制;水稻根系土中As、Cu、Pb、Cr、Zn、Ni重金属元素含量值均低于土壤环境质量二级标准;8种重金属元素在水稻籽实中的平均富集系数高低总体表现为Cd>Zn>Cu>As>Hg>Ni>Cr>Pb,迁移能力由大到小依次为:Cd→Zn→Cu→As→Hg→Ni→Cr→Pb。

Through field sampling and laboratory analysis, the content characteristics and migration rules of 8 heavy metals in rice and its root soil in the sandy area of ganxian county were studied. The results showed that the average contents of 8 heavy metals in rice did not meet the national food safety standards. The contents of As, Cu, Pb, Cr, Zn and Ni in the rice root soil were all lower than the secondary standard of soil environmental quality. The average enrichment coefficient of 8 heavy metal elements in rice seeds is generally presented As Cd Zn>Cu>As>Hg>Ni>Cr>Pb, and the migration ability is from large to small As: Cd Zn Cu As Hg Ni Cr Pb.