The Effects of Vegetables and Planting Years on the Soil Heavy Metal Contents of Mulching Cropping

Based on the importance of soil heavy metal content to vegetable quality and the incomprehension about the effects of vegetables and planting years on soil heavy metal contents,two representative areas of vegetable planting region were choose for this study.The research results were as follows.1.Planting years affected the soil heavy metal contents faintly.2.Fruit vegetables and leaf vegetables had similar effects on soil heavy metal contents,but were abviously different with root vegetables.3.Pb,Cd content in Yongnian changed distinctly with that in Dingzhou,this should be paid more attention to monitoring.