扬州市江都区水田土壤环境质量评价

江都区作为国家大型优质稻米生产基地，其水田土壤环境质量状况对水稻生长，粮食安全、生态环境、人民身体健康都有重要的影响。通过对扬州市江都区水田土壤8 大重金属和666、DDT 2 种有机污染物的累积污染指数、单项污染指数以及综合污染指数的分析，以期了解扬州市江都区水田土壤环境质量状况。结果表明：江都区水田土壤8 大重金属和有机污染物666 和DDT无明显累积现象，Cd、Cr、Cu、Zn、Ni、666 和DDT 100%符合《绿色食品产地环境技术条件》，Hg、As、Pb 有98.7%的样点符合《绿色食品产地环境技术条件》；94.8%的样品土壤处于清洁水平，3.9%的样品土壤处于尚清洁水平。综上所述，江都区耕地土壤未受到重金属和666 和DDT的明显污染，土壤环境质量满足农产品安全生产的条件。

Evaluation of Soil Environment Quality of Paddy Field in Jiangdu District of Yangzhou City

Jiangdu District of Yangzhou City is considered as one of the national large-scale high-quality rice production bases, and its＇ paddy field environment quality condition is closely bound up with the rice growth,food security, ecological environment and human health. The author analyzed the cumulated pollution index,single subject pollutant index and integrated pollutant index of 8 major heavy metals and two organic pollutants （666 and DDT） on the cultivated soil of Jiangdu District in Yangzhou City to estimate the soil quality. The results showed that： there＇s no clear phenomenon of accumulation of heavy metals and organic pollutants in the paddy field soil of Jiangdu District; the contents of Cd, Cr, Cu, Zn, Ni, 666 and DDT in all sampling sreached the standards of Environmental Technical Terms for Green Food Production Area at 100%; the content of Hg, As and Pb in about 98.7% samplings were in conformity to the standards of Environmental Technical Terms for Green Food Production Area; about 94.8% samplings reached the clean level, and only 3.9% samplings remained at the lower level of clean. From the above, the author came to a conclusion that the cultivated soil of Jiangdu District did not obviously polluted by heavy metal or 666 or DDT, and the soil quality could satisfy the security producing condition for agricultural products.