Aerobic incubation experiments of soil were made with css amendments in the greenhouse center in Beijing Forestry University. Plastic pot were filled with 700 g of the mixture of css and soil supported by gravel at tha bottom. Four css/(css+soil) ratios of 5%, 10%, 15% and 20% were studied and the samples were abbreviated as s1, s2, s3 and s4. A same group of css-amended soil samples were employed to study the effects of css on the growth of tall fescue by using pot experiments. The pot were sowed with 0.7 g of seeds and were periodically irrigated.