张家港市土壤-水稻系统重金属积累与转移特征分析.pdfVIP

天津农Aι科学 Tiαnjin Agricultura1 Sciences 2012 ,18(4) :40-46 ·土壤肥料与节水灌溉 积累与转移特征分析 张家港市土壤一水稻系统重金 胡潇潇 1 ，李建龙 1 ，杨红飞 1 ，钱伟东 2 ，王科峰 2 (1.南京大学生命科学学院，江苏南京 21∞93; 2. 张家港市农业委员会作物与蔬菜栽培站，江苏张家港 2156∞) 摘要:为了解张家港市士壤-水稻系统的重金属积累与转移情况，对城区外各处农田随机抽样，分析土壤-水稻系统的有关重 金属残留，并对重金属的累积现状及生物富集情况对照相关国家标准进行分析、评价。研究表明，所有采样点的土壤重金属的 结合污染指数值均小于0.7 ，和平村采样点水稻籽粒 Cr 轻度超标，且 Cu 、 Zn 的单因子指数值也最高，除此以外的样点水稻籽 粒综合评价结果理想。水稻不同器官对同一重金属元素的富集能力不同，本研究中表现为根〉叶〉籽粒;水稻同一器官对不同 重金属元素的富集能力也存在差异。 关键词:土壤-水稻系统;重金属积累与转移;综合污染指数;富集能力 中图分类号:X53;X825 文献标识码 :A DOI 编码: 1O.3969/j .issn.1006-6500.2012.04.011 Assessment on Heavy Metals Accumulation and Transformation of Soil-rice System in Zhangjiagang City 1 1 1 2 HU Xiao-xiao , LI Jian-long , YANG Hong-fei , QIAN Wei-dong , WANG Ke-feni (1.School of Lìfe Science , Nanjing Unìversity , Nanji吨， Jiangsu 210093 , China;2.Zhangjiagang City Bureau of Agriculture for Planting Sta- tion ,Zhangjiagang , Jiangsu 215600 , China) Abstract: In order to know heavy metals accumulation and transformation of soil-rice system in Zhangjiagang City , random sampling was collected in the farm outside urban area to text the contents of heavy metals in soil-rice system , then according to relative Chi- nese national standards , the pollution and biological enrichment situation of heavy metals were analysed and evaluated. The study found that the comprehensive pollution indexes of the soil were alllower than 0.7;The evaluation to heavy metal pollution of rice grain showed that in Heping Village , Cr was slight polluted and the single factor index of Cu and Zn were both higher than the other sam- pling sites. Except the sampling sites in Heping Villege , the rice grain quality was safe without pollution in study area. Diffe