Houttuynia cordata Thunb (HCT) is selected to absorb Cadmium from soil polluted by Cadmium seriously. The present study shows HCT’s hyper accumulation to Cadmium in soil, and the important roles microbial play in the process of absorption. The accumulation rate is 2.86% when Cadmium’s content is 5 mg•kg-1 in soil, while 1.63% when Cadmium’s content is 10 mg•kg-1. After 72 days’ growth, the number of bacteria in soil is approximately a quarter of that existed before cultivation, so is the number of mildew. But the number of actinomyces increases numerously just when Cadmium was added, and then back to the former level. On the combined effect of HCT and rhizospheric microbes, soil micro-ecosystem could maintain stability well. But a further research of interaction mechanism among HCT’s rhizosphere, actinomyces and Cadmium, is needed. The technology of combined remediation of plant and microbial on heavy metal contaminated soil could really achieve from the perspective of ecological restoration of soil, will have a great prospect.
