Geochemical Characteristics of Heavy Metal Element of Soil-Plant System in Black Soil Region in Jilin

Based on systematic field investigations and sample collection and test of soil and maize seeds in black soil region in central Jilin,by using methods of statistical comparison and correlation analysis,studied were made on the spatial differences of heavy metal content in soil,available content in soil and heavy metal content in maize seeds. At the same time heavy metal pollution in soil- plant system were evaluated. The aim of the research is to provide scientific basis for environmental protection in the important grain producing area. The results show that heavy metal content in soil,available content in soil and heavy metal content in maize seeds are different in different research areas; There are no external pollution sources of As、Cr 、Cu 、Ni、Zn elements; The surface enrichment trend of Cdelement may be caused by the use of pesticide; The soil environmental quality is very good in black soil region in central Jilin,which is very safe and of the first level.