Correlation between Soil Heavy Metal Pollution and Quality of Vegetable in Representative Sewage Irrigation Farming District

The single factor pollution index and the comprehensive pollution index were adopted to investigate the heavy metals(Hg,Cr,Cd,Pb,As,Cu,Ni) pollution of different irrigated soils and quality of vegetables in representative sewage irrigation farming district of Kunming city.The results showed that the soil environment was qualified for the second level criterion of Standard of Soil Environment(GB15618-1995).But some vegetables have been seriously polluted by heavy metals according to the national vegetable food criterion.The Cd content in the soil showed a significantly positive correlation with the Cd content in most vegetables,while there was no correlation between the As content in most vegetables and soil AS contamination.