Content of Heavy Metals in Soil and Vegetables from Vegetable Land of Yongnian County

Content of heavy metals in soil and vegetables were studied by combining the collection of samples with laboratory analysis in typical vegetable production area of Yongnian County.The results showed that the average content order of heavy metal Cu,Zn,Pb and Cd in the soil was the Zn(highest),Pb(normal),Cu(normal) and Cd(lowest).But their contents were below the criteria of environmental quality standard for soils.Compared with villages,there was the greatest variability in the contents of heavy metals such as Cd in soil,the content of Zn and Pb in soil secondly,and there was the least variability in the contents of heavy metals such as Cu in soil.The content of Cu in edible part of the fruit vegetables was higher than in leafy vegetables and root vegetables.The contents of Zn,Pb and Cd in edible part of leafy vegetables were higher than in fruit vegetables and root vegetables.The contents of heavy metals in edible part of three kind vegetables were under the permitted levels in foods.