关键词: 品种差异, 品种差异

Abstract: 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 samplings reached 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.