Experimental research on improvement of reclaimed soil properties and plant production based on different ratioes of coal-based mixed materials

On the goal of comprehensive utilization of coal-based mixed materials, weathered coal, coal waste and fly ash are trying to be used, by mixing those materials according to a certain famula which is weathered coal∶coal waste∶fly ash=5∶1∶4, as well as adding the exact quantitative fertilizer, which improve reclaimed soil in mining area. This kind of coal-based mixture is full of nutrient for soil improvement. Through the pot experiments, coal-based mixture could distinctly improve the fertility of soil, the pot experiments results showed that the output of alfalfc(Medicago sativa L.) is two times as much as that of the controlled, and the crude proteins are also distinctly improved. Using coal-based mixture can avoid problems of soil compaction caused by only using of fertilizer, and improved ratio of comprehensive utilization of waste materials in mining area.