Correlation between the heavy metal pollution in soil and quality of vegetable in farming district of Zhengzhou

The singlefactor pollution index and the comprehensive pollution index were adopted to investigate the heavymetals（Hg 、Cr 、Cd 、Pb 、As 、Cu 、Zn）pollution of ３ different irrigated soils and quality of vegetables growing in them inZhengzhou suburb ． The results show that the soil environment in Zhengzhou suburb is qualified for the second level criterion of “Standard of Soil Environment” （GB１５６１８ — １９９５） ． But some vegetables have been polluted seriously by heavymetals according to the national vegetable food criterion ． The pollution of Zn ， Cr ， Cu ， Cd in soil shows a significantlypositive correlation with the pollution of most vegetables ． And Pb ， Hg pollution has not presented a correlation betweenthe pollution of most vegetables and soil contamination ．