摘要
对青岛市主要蔬菜产地土壤重金属Pb、Cd、Hg、As、Cr、Cu和Zn的含量进行了调查分析，并采用单项污染指数与综合污染指数相结合的方法对环境质量状况进行了评价。结果表明，各监测点土壤综合污染指数的排序为莱西〉即墨〉平度，且均小于0．7，土壤环境质量处于清洁安全状态，适宜蔬菜种植。但莱西和即墨有4个监测点的土壤样品重金属镉含量超标，并且随着取样深度的增加镉含量逐渐降低，表明镉污染主要集中在土壤表层（0—20cm）。
The contents of heavy metals, Pb, Cd, Hg, As, Cr, Cu and Zn, in soil of vegetable farmlands of Qingdao City were investigated and analyzed. Then the enviromental quality was evaluated by the method of single pollution index combined with the comprehensive pollution index. The results showed that the comprehensive pollution index of the soil samples from different investigated points changed following the order of Laixi 〉 Jimo 〉 Pingdu and was less than 0. 7, so the soil belonged to the clean level and was suitable for vegetable cultivation. But the Cd content in four soil samples from Laixi and Jimo exceeded the standard level and decreased with the increase of sampling depth, which showed the Cd pollution was mostly centralized in the upper soil （ 0 - 20 cm）.
出处
《山东农业科学》
2011年第1期63-67,共5页
Shandong Agricultural Sciences
基金
青岛市科技攻关项目(07-2-1-22-nsh)
关键词
蔬菜地
重金属
污染
评价
Vegetable farmland
Heavy metal
Pollution
Evaluation
