In view of the serious pollution of the surrounding environment caused by the large-scale storage of mine mud and red mud,the dehydrated mine mud and red mud were taken as the research objects,starting from the physical properties,chemical properties and microbial indicators of the soil formation disposal substrates,the effects of soybean and upland rice in-tercropping-fertilizer synergism on the soil formation effect of pure mine mud substrates and mine mud+red mud mixed sub-strates were investigated.The results showed that the electrical conductivity of the two substrates increased first and then de-creased with the prolongation of soil formation disposal time,and the requirements of Land Reclamation Quality Control Stand-ard were always met in the process of soil formation.The pH values of the two soil formation disposal substrates were all below 8.5 after 115 days of soil formation disposal,which met the requirements of Technical Specification for Mine Ecological Environ-ment Protection and Management.The total nitrogen content in the mine mud and red mud mixed soil formation disposal sub-strates and the pure mine mud soil formation disposal substrates reached the first level in the second national soil census stand-ard,the available potassium content reached the second and fourth levels respectively,the available phosphorus content was a-bove the fourth level,and the organic matter content reached the fourth level.In the process of soil formation disposal,the parti-cle size of the substrates increased and the volumetric weight decreased,which was beneficial to crop cultivation.After the soy-bean and upland rice intercropping-fertilizer synergism,the microbial diversity in the soil increased,the population richness in-creased,the species population distribution was more uniform,and the ecosystem was more healthy.The results of this study can provide a reference for the ecological restoration of soil formation disposal of mine mud and red mud.
mine mudred mudsoil formationfertilizersoybean and upland rice intercroppingcollaborative ecological restoration
NETL
NSTL
万方数据
