Method for repairing soil in ionic rare earth waste tailing area by AM fungi and hybrid pennisetum alopecuroides

Abstract

The invention discloses a method for repairing soil in an ionic rare earth waste tailing area by AM fungi and hybrid pennisetum alopecuroides. The method comprises the following steps: (1) firstly, investigating the AM fungi in the soil in the ionic rare earth waste tailing area; (2) detecting the physical and chemical properties of the soil in the ionic rare earth waste tailing area, discussing the soil fertility and main environmental influence factors, and evaluating the soil quality of the waste rare earth mining area; (3) carrying out propagation culture on AM fungi-glomus mosseae by utilizing sudangrass; (4) plowing and flattening the soil in the ionic rare earth waste tailing mining area, and then applying a propagated glomus mosseae agent to the surface layer; (5) sowing the hybridpennisetum alopecuroides seeds on the soil to which the microbial inoculum is applied, and covering with soil; and (6) carrying out normal field management such as moisture and fertilization. The method not only can improve soil and increase vegetation coverage, but also can promote resource regeneration and utilization rate and reduce remediation cost.

Description

technical field [0001] The invention relates to the field of ecology, and relates to a method for degrading the ammonia nitrogen content and increasing the pH value of the soil in abandoned mining areas of ionic rare earths by using the symbiotic effect of AM fungi and hybrid pennisetum, specifically using AM fungi and hybrid pennisetum to repair ionic rare earth waste Soil in the tailings area. Background technique [0002] Ionic rare earth ores are important strategic resources in my country, mainly distributed in Jiangxi, Guangdong, Fujian, Hunan and Guangxi in the south. For a long time, ionic rare earth mines have mostly been mined by in-situ leaching techniques such as ammonium sulfate and ammonium bicarbonate. After mining, a large area of ​​rare earth mine tailings land is left behind, which not only occupies land resources, but also destroys the normal vegetation in the mining area and surrounding areas. Soil with high ammonia nitrogen content, low pH value, seriou...

AI Technical Summary

Problems solved by technology

For a long time, ionic rare earth mines have mostly been mined by in-situ leaching techniques such as ammonium sulfate and ammonium bicarbonate. After mining, a large area of ​​rare earth mine tailings land is left behind, which not only occupies land resources, but also destroys the normal vegetation in the mining area and surrounding areas. High soil ammonia nitrogen content, low pH value, serious soil acidification and desertification, weak water and fertilizer retention capacity, easily cause serious water, soil and nutrient loss, and the phenomenon of no grass growing, seriously restricting agricultural and economic development

In addition, the content of ore leaching agents such as ammonium sulfate in tailings is relatively high, which pollutes surrounding water bodies and farmland with soil erosion and surface runoff, threatening the ecological environment and human health