中文摘要：

对江汉平原后湖地区农田的土壤环境质量和污染状况进行了系统的调研，采用单因子指数、内梅罗综合指数、Hakanson生态风险指数法对研究区Cd、Hg、Cu、Zn、Pb、Ni、As、HCH、DDT进行分析与评价。结果表明，研究区9种单要素污染程度依次为Cd〉As〉Cu〉Zn〉DDT〉Hg〉Cr〉Ph〉HCH，相比较而言，Cd污染为主要污染元素，8个地块已受到Cd的轻度污染，土壤中的农药残留主要成分为DDT；3．81％的农田的综合污染指数大于1（轻度污染），15．59％的农田处在警戒限：研究区潜在生态风险指数整体偏小，除两个地块的Cd属中潜在风险外，其他都属低潜在风险。整体而言，江汉平原农田土壤环境质量属清洁和安全范围，符合发展现代农业的要求。

英文摘要：

Forty-two farmland surface soil samples were collected from Houhu Area and analyzed for the concentrations of Cd,Hg,Cu,Zn,Pb,Ni,As,HCH and DDT. Ecological risk and soil environmental quality of farmland were analyzed and evaluated by using single pollution index, the Nemerou synthetical index and Hakanson ecological index. The results indicated that the pollution of Cd was the most serious becaus eight plots were slightly polluted, and the pollation seriousness of other factors was followed by this order Cd〉As〉Cu〉Zn〉DDT〉Hg〉Cr〉Pb〉HCH. DDT was the main pollution of organic pesticides. the 3.81% farmland of synthetical pollution level reached slight risk grade, the 15.59% farmland of synthetical pollution level reached cautionary risk grade. Taken it as a whole,the index of ecological risk was still low expect two units, where Cd content leads to moderate ecological risk level. The comprehensive assessment showed that the soil environmental quality of farmland in Jianghan Plain was quite clean and safe for meeting the requirement of developing modern agriculture.