The contents and potential pollution risks of Cd

Cu

Zn and Pb were studied in vegetable soil around Dongting Lake in Hu′nan Province.The results showed that the contents of Cd

Cu and Zn in top soil were higher than the background values

while Pb contents were lower.With single pollution index and comprehensive pollution index

the ascending order of the risks of heavy mental pollution was CdZnCu in vegetable soils.Pollution of Pb was not found in the whole study area.Based on the pollution index and comprehensive pollution index of soil heavy metals

the vegetable soil of Xiangyin County

Yuanjiang District

Ziyang District and Haoshan District belonged to polluted soil

and the soil of Huarong County exhibited warning pollution level

requiring immediate remediation or change in the pattern of land use.By contrast

the soils collected from Junshan District and Nanxian County were almost free to pollution

suitable for the cultivation of green vegetables.The relationship of soil Cd

Cu and Zn content was significantly positive

while the coefficients were low.