内蒙古农牧交错区土壤重金属含量及其分异  

Heavy Metal Content in Agro-pastoral Transition Area and its Differentiation

作　　者：庞丽蓉 张福金[2] 李秀萍[2] 崔艳[2] 冯小慧[2] 刘建平[2] 

机构地区：[1]托克托县环保局环境监测站,内蒙古托克托010000 [2]内蒙古农牧业科学院植物营养与分析研究所,内蒙古呼和浩特010031

出　　处：《内蒙古农业科技》2010年第4期71-72,共2页Inner Mongolia Agricultural Science and Technology

基　　金：农业部"农牧交错带农业面源污染防治与示范"项目资助

摘　　要：通过室外采样室内分析研究了内蒙古农牧交错区表层土壤重金属的含量状况及不同土壤类型的分异特征。102个代表性样品的分析结果表明,研究区铜、锌、镉、汞和砷重金属元素的平均含量均高于内蒙古第二次土壤普查调查值;铅、锌、镉、汞和砷均高于世界土壤背景值,特别是汞为世界土壤背景值的3.3倍;按照我国二级土壤环境质量标准,汞的超标率为8%;不同类型土壤中金属含量分异明显。内蒙古农牧交错区表层土壤重金属污染不容忽视。Heavy metal contents in top soils of Farming-grazing transitional zone and their differential characteristics were studied in the presented paper through field soil investigation.Averages of total Cu,Zn,Cd,As and Hg,except Pb and Cr,in the 102 selected soil samples were higher than the contents in top soils based on the second general survey of soil of Inner Mongolia province;besides,the result were also higher than the background values of the whole world.Particular,the contents of Hg was 3.3 times than the background values of the whole world and the index of Hg exceed the threshold levels according to the second grade of standards for soil environmental quality of China（GB15618-1995） was 8%.Moreover,the differential characteristics of the heavy metal contents were excessive in differential soil type.

关 键 词：农牧交错区 土壤 重金属含量 分异特征 

分 类 号：S153.6[农业科学—土壤学]