Abstract:This study was to explore the feasibility of the biochar prepared from fungal residue as raw material for remediation of cadmium (Cd) contaminated soil. A pot experiment was carried out, and Letinous edodes (Berk.) sing residue biochar (SC) and Pleurotus ostreatus (Fr.) Kummer residue biochar (PC) were taken as the research objects, the effects of SC and PC on the physical and chemical properties of Cd contaminated soils, distribution of different forms cadmium in soils, Chinese cabbage growth and Cd accumulation were measured and analyzed. The application rates of 0.5%, 1% and 2% biochar (w/w,%) were set up. The results showed that SC and PC significantly increased soil pH and organic matter (SOM). Compared with the control, 2% biochar application could increase soil pH by 1.05 and 1.10 units, respectively; and increased soil organic matter (SOM) by 80.6% and 61.2%, respectively. Application of SC and PC reduced the content of soil exchangeable Cd and increased the residual Cd concentration. Correlation analysis showed that soil exchangeable Cd was significantly negatively correlated with pH, SOM and sucrase. Compared with the control, Cd accumulation in Chinese cabbage was significantly reduced by 57.5% and 54.1%, respectively, in 2%-SC and 2%-PC treatments. Compared with the control, the yield of Chinese cabbage was increased by 53.4% and 41.6%, respectively, in 1%-treatments, indicating that high dosage of fungal residue had negative effect on the growth of Chinese cabbage. On the whole, SC and PC could improve soil properties, reduce the toxicity of Cd to plants, and promote growth of Chinese cabbage.