浙江省嘉兴市南湖区土壤环境质量评价和无公害水稻生产

在浙江省嘉兴市南湖区按无公害水稻产地环境要求,对该区103个水稻土样品进行测定和评价。结果表明:该区土壤环境质量较好;耕层全砷、铅、铬、镉和汞的平均含量分别为7.7、23.7、88.9、0.18和0.22 mg.kg-1;被测定的土壤未受到砷和铅的污染,有94个点(占总样点数的91.3%)符合无公害水稻产地土壤环境质量要求,但有9个点(占总样点数的8.7%)受到镉和汞的污染。提出了加强污水和固体废弃物处理、农田施用石灰、增施磷肥和有机肥及选用抗逆性强的水稻良种等相应的措施。

Soil environmental quality and its assessment of rice production for non-environmental pollution in Nanhu district of Jiaxing in Zhejiang Province

One hundred and three samples of paddy soils were taken in 2004 from Nanhu district of Jiaxing,northern Zhejiang Province for charactering concentrations of several heavy metals according to environmental requirements for origin of non-environmental pollution rice,and the environmental quality of the soils was assessed.The results show that the environmental quality of paddy soils in the district was well and suitable for rice production of non-environmental pollution.Total concentrations of As,Pb,Cr,Cd and...