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 heavy metals(Hg、Cr、Cd、Pb、As、Cu、Zn)pollution of 3 different irrigated soils and quality of vegetables growing in them in Zhengzhou suburb.The results show that the soil environment in Zhengzhou suburb is qualified for the second level criterion of “Standard of Soil Environment”(GB15618—1995).But some vegetables have been polluted seriously by heavy metals according to the national vegetable food criterion.The pollution of Zn,Cr,Cu,Cd in soil shows a significantly positive correlation with the pollution of most vegetables.And Pb,Hg pollution has not presented a correlation between the pollution of most vegetables and soil contamination.