广东枫朗镇、长山镇茶园土壤重金属安全性评估

Safety assessment of heavy metal in tea garden soil in Guangdong Fenglang and Changshan townlet

通过采集广东省茶叶专业镇——大浦枫朗镇和廉江长山镇茶园的10份土壤样品,对茶园土壤中的6种重金属Cr、Cu、Pb、As、Cd、Hg的含量进行测定,并对其安全性进行评估。结果表明,两镇茶园土壤中的6种重金属元素的平均含量值均低于"NY 5020-2001无公害茶园土壤环境质量标准"的限定值,重金属的单因子污染指数Pi不超标,综合污染指数(P<0.7)在安全范围之内,说明两镇茶园的土壤环境未受重金属污染。

This research collected 10 soil samples from Guangdong tea specialized Town Dapu Fenglang and Lianjiang Changshan tea garden. And we determined the content of 6 kinds of heavy metal Cr, Cu, Pb, As, Cd and Hg. On the base of above examination we assessed the safety of the 6 heavy metal. The results showed that the average content of 6 kind of heavy metal Cr, Cu, Pb, As, Cd and Hg from the two tea gardens were lower than the restriction in NY 5020-2001 Soil environmental quality standards for pollution-free tea. The single factor pollution index Pi was not exceed the standard and the total pollution index （P〈0.7） was in safe range, which indicated the soil environment in the two tea garden was free from heavy metal pollution.