Effects of mushroom waste on improvement of reclaimed soil qualityin coal mining areas

• Published in: 煤炭学报：英文版 2013, Vol.19 (2), p.237-242
• Main Author: Shu-Li GUO Qian LI Xin-Ju LI Yao-Lun ZHAO Xin-Gang WANG
• Format: Article
• Language: English
• Subjects: 土壤质量指数; 土壤质量指标; 应用程序; 煤炭开采; 矿区复垦土壤; 蘑菇废料; 表层土壤; 食用菌下脚料
• ISSN: 1006-9097

Restoring soil quality is the main evaluation norm of the reclamation. In order to reveal the effects of mushroom waste on the quality improvement of reclaimed soil in coal mining areas, the physical, chemical and microbial characteristics of soil are studied. The results show clear improvement in the soil after using mushroom waste. Because of human cultivation and fertilization, cultivated soil after reclamation exhibits high comprehensive quality and the index of quality of surface soil reaches 0.64 and 0.73. The average index of surface soil quality is as high as 0.52 and 0.54. In comparison, the quality of reclaimed soil of forest land is low, with average index of 0.40. The effects of mushroom waste are mainly on the surface soil in the first 2 years after the application. After that period, with the decomposition of mushroom waste, soil quality index tends to be the same as the original soil. The quality of surface soil is higher than that of subsoil, especially after the application of mushroom waste, at which point the soil quality reaches a peak at about 15 cm. Cultivated soil after reclamation has great variance in quality, after the coefficient of 24.74%. Mushroom waste can reduce such variation, particularly with long-term use. The variance efficient falls to 3.59% after 3-year application.