Analysis on heavy metal environmental effect in soil of vegetable fields in southeast suburbs of Harbin.

This paper studies the heavy metal content and heavy metal relativity in soil of vegetable fields in southeast suburbs of Harbin, further analyzes the crop accumulation and the environment effect. The results show that the heavy metal contents in samples soil are Cu 28.451 mg·kg-1,Pb 35.258 mg·kg-1,Zn 57.654 mg·kg-1,Ni 30.209 mg·kg-1,Cr 32.660 mg·kg-1,Cd 0.126 mg·kg-1,As 3.934 mg·kg-1,Hg 0.049 mg·kg-1, respectively. In the aspect of environment effect, the heavy metal contents are decreasing from bottom to top in plant organs. Heavy metal contents at plant root are the highest. Pea has stronger accumulation ability for Pb and Cr than eggplant and onion. Onion has stronger accumulation ability for Cd then eggplant and pea, while eggplant has stronger accumulation ability for As. In the aspect of food safety, the heavy metal contents of the 3 vegetables: onion, pea and eggplant are not exceeded the national standards.