Abstract:Effects of straw ash and sewage sludge on the morphologic changes of cadmium in cadmium contaminated soil were investigated with potted cabbage.The results showed that application of straw ash,sewage sludge can lead to the redistribution of Cd in soil.Application of straw ash,sewage sludge converted soluble and exchangeable Cd in the soil into inertia and organic-bound Cd.The concentration of soluble and exchangeable Cd was decreased 56.60%-68.38%,and organic-bound fraction was increased 166.7%-281.1% in comparison with the control.Inorganic-bound Cd was significantly increased with the largest increase of 72.60%-73.20%.Residual Cd increased 37.93%-112.5% in comparison with the control.Therefore,straw ash and sewage sludge can be applied to repair Cd contaminated soil.