Effects Of Cadmium Pollution On Soil Microorganisms Of Energy Plants

The effect of cadmium pollution to soil microorganisms is studied based on different concentrations of cadmium in pot experiment with maize, sweet sorghum, shinyleaf yellowhorn and heterophyllous chastetree. The results show in the following:(1) cadmium reduces the metabolic activity of soil microorganisms of sweet sorghum while, for the other plants, a low concentration of cadmium simulates the metabolic activity and a high concentration inhabits it; (2) cadmium pollution does not affect the soil microbial diversity of sweet sorghum and shinyleaf yellowhorn largely, a high concentration of cadmium pollution increases the soil microbial diversity of maize, and a low concentration of cadmium pollution reduces the soil microbial diversity of heterophyllous chastetree; (3) stages of plant growth have a bearing on the carbon source utilization patterns of soil microorganisms, indicating the changes in the structure of microbial communities. This is instructive for energy plant phytoremediation of contaminated soil.