[Objective]Characteristics of heavy metal pollution in soil and rice of Yangtze River Delta Region were studied.[Method]Heavy metal contents of more than 150 samples in Yangtze River Delta region were determined so as to make the soil environmental quality assessment and study the content distribution,transformation and distribution characteristics of heavy metals in different regions and different plant parts.[Result]The Yangtze River Delta region was polluted by Cd,Pb,Cr,Cu and Zn,among them Cd pollution was the most serious;Pb,Cu and Zn took second place;Cr appears the lightest;And there was almost no Hg and As pollution in this area.The Nemero pollution index of soil was 0.880 which was at the alert level.Cd,Cr,Cu,Hg and Zn in rice grains exceeded the background values.Heavy metal pollutions in soils divided by regions were in order of Taihu Lake region 〉Zhejiang region〉 Yangtze River region and urban areas 〉towns and rural areas.Heavy metal pollutions in soil divided by the uptake level were in order of rhizosphere soil 〉rice straw 〉rice grain.Transformation coefficients were in order of Cd〉 Cu 〉Zn〉 As 〉Hg〉 Pb〉 Cr.Distribution coefficients were in order of Zn〉 Cr〉 Cd 〉Cu〉 Hg 〉Pb 〉As.[Conclusion]There were larger value ranges of contaminated elements in the Yangtze River Delta Region,moreover individual samples had serious pollution,so the prevention and control of heavy metal pollution should be strengthened.
