Abstract:

In order to study accumulation property of the heavy metals in different crops and establish the plant species of artificial eco-system, the author chose four species crops as subjects, including Zea mays L., Cucurbita moschata, Glycine javanica L., Giycine max (L) Merril, investigated around the golden mineral in Shaanxi Province and determined the concentration of the heavy metals by applying flame atomic absorption spectrometry, including copper, zinc and cadmium. The results showed that, except the rhizospheric soil of Glycine javanica L. was clean to Zn, the rhizospheric soils of four species crops were contaminated by 3 kinds of metals because their single factor pollution index were greater than 1. Among these crops, the concentration capacity to zinc was all powerful for Zea mays L., Giycine max (L) Merril and Cucurbita moschata. Especially Cucurbita moschata had the biggest transfer factors and concentration factors to Zn, and they were 43.18 and 7.11 individually. Glycine javanica L. and Zea mays L. had the powerful concentration capacity to copper. Although all crops transfer factors were more than 1, their concentration factors were all less than 1, so all crops had the weaker concentration capacity to cadmium.