Abstract:Phytoremediation is an effective measure to eliminate heavy metals, contaminants from soils,, an experiment was carried out during March-Dec. 2004, on effect of a green manure crop, Chinese milk vetch (Astragalus siniucus L.) in a field of heavy metals contaminated soil in the vinicity of a smeltery in Guixi City of Jiangxi Province. Results showed that cultivation of milk vetch significantly lowered concentrations of heavy metals and soil comprehensive pollution index, and more or less the same as the treatments of organic reagents, except for effect on decreasing Zn and Cd concentrations and comprehensive heavy metal pollution index, which were not so big in scale. When compared with the treatment of milk vetch+organic reagents, the treatment of milk vetch did not differ much in heavy metal concentrations and comprehensive pollution index. Elsholtzia splendens Nakai ex F. Maekawa by A. siniucus enriches Cu, As, Pb and Cd to a varying extent. The evaluation of enrichment coefficients indicate that the plant is much higher than milk vetch and milk vetch+organic reagent in heavy metal enrichment, and the treatment of milk vetch lies in between the treatment of organic reagent and the treatment of milk vetch+organic reagent in effect on plant enrichment of heavy metals.