The effects of sulfur on growth,cadmium absorption and accumulation in hyperaccumulator-Sedum alfredii Hance were investigated in hydroponic culture.Biomass,Cd contents and amounts of Cd accumulated of leaves,stems and roots of Sedum alfredii Hance were in the order of leaves>stems>roots and Cd100>Cd10,showed Sedum alfredii Hance hyperaccumulated charactreristics of Cd.With increasing S supplies from 1.5 to 2.25 mmol/L,biomass,Cd contents,amounts of Cd accumulated in leaves,stems and roots,total amounts of Cd accumulated of Sedum alfredii Hance were increased significantly.It was also found that there were a higher ratio of shoot Cd accumulation /roots Cd(S/R>1) in any S and Cd treatments,suggesting that appropriate S application enhanced Cd absoption,translocation from root to shoot in Sedum alfredii Hance.From these results indicated that "sulfur-induced Cd requirement"was evident in Sedum alfredii Hance.With respect to phytoremediation,the application of S at appropriate rates may be useful approach to enhancing the growth and Cd accumulation in Sedum alfredii Hance for phytoremediation of the Cd-contaminted soils.Cd uptake efficiency and translocation efficiency of Sedum alfredii Hance were increased with increasing S supplies and the relationship coluld be described by logarithmic equation and linear equation,respectively.