临沂市花生产地土壤环境质量分析与评价

对山东省临沂市花生产区土壤重金属Cd、Hg、As、Pb、Cr、Cu、Zn和Ni的含量进行了调查分析,并采用单项质量指数与综合质量指数相结合的方法对环境质量状况进行了评价。结果表明各重金属的平均含量均低于"食用农产品产地环境质量评价标准"(HJ 332-2006)规定的限值,土壤环境质量为1级,属于清洁水平,适宜发展无公害花生。但部分监测点的土壤样品重金属含量超标,Cr的样本超标率为4.76%,Ni的样本超标率为19.05%。所监测的8种元素的平均含量,除Cd和As外,均高于山东省农业土壤棕壤自然背景值,表明重金属在土壤中已经产生了一定的累积。

Analysis and Evaluation on Soil Environmental Quality of Peanut Farmland in Linyi

The contents of heavy metal elements Cd,Hg,As,Pb,Cr,Cu,Zn and Ni in the soil of peanut farmlands in Linyi city,Shandong province were investigated,and the soil environmental quality was evaluated by the methods of single quality index and comprehensive quality index.The results showed that the average contents of all the tested heavy metal elements in the soil were under the threshold prescribed by ＂Farmland environmental quality evaluation standards for edible agricultural products＂（HJ332─2006）.The environmental quality of the soil was classified as the first class,belonging to clean level and fitting for the planting of non-environmental pollution peanut.But the contents of some heavy metal elements in several areas were beyond the limit values,the rate of soil samples in which Cr content was beyond the limit value was 4.76%,and that with over-standard Ni content was 19.05%.The average contents of the tested eight heavy metal elements（except Cd and As） were higher than the natural background values of agricultural brown soil in Shandong,which indicated there was a certain accumulation of heavy metal elements in the soil.