徐州城北典型矿粮复合区的土壤和水稻籽实作为研究对象,分别对土壤及水稻籽实中镉、铬、锌、铅、铜等重金属含量进行了分析,结果表明:研究区域内除部分点位Cd超过国家二级标准,大部分Cd和Cr超出背景值;水稻籽实中Pb和Cr元素污染相对严重且较之土壤重金属的分布,水稻籽实中重金属更离散,其中Cr离散性最大;水稻籽实中Zn的平均富集系数最大,Pb最小,综合考虑采样点位置和局部污染源特征,可以推断水稻籽实中的重金属不仅仅来源于土壤.%In this paper, we study on the soil and rice seed samples collected from the mine-crop mixed area in northern suburb of Xuzhou, separately analyzed heavy metals such as cadmium, chromium, zinc, lead and copper contained in the soil and rice seeds.The result shows that most Cd and Cr exceed the background data, with only a few exceed national second class standards for Cd. The Pb and Cr are heavily polluted. The heavy metals are more separated in the rice seeds, with Cr the most separated among all. The average Bioconcentration factor of Zn in rice seeds is the biggest, Pb smallest. A comprehensive research on the sample's location and partial pollution features indicate that the heavy metals in the rice seeds are not only from the soil.
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