关键词: Glomus etunicatum, 紫花苜蓿, 铁尾矿, 植被恢复, 磷素, 微生物区系

Abstract: With pot experiments in room, the influences of arbuscular mycorrhizal fungi on the alfalfa growth directly planted in iron tailing and the environments of iron tailings are investigated. The results show that the addition of  Glomus etunicatum can greatly improve the emergency and survival rate of alfalfa in iron tailings, and significantly increase the root dry weight, leading to the reduction of bacteria and the increase of epiphytes and actinomycetes. Its difference is significant. Mycorrhizal fungi has a high infection rate of 80% or more on roots of alfalfa, which promotes iron phosphorus content increased in the tailings. Comparing with different adding level, 2.5% of mass ratio is the most effective and can be used as the suitable inoculum concentration. In short, the vaccination of Glomus etunicatum in iron tailings can significantly increase the root growth of alfalfa, improve the rhizosphere microflora, and promote the release of phosphorus in the tailing, which benefit for vegetation reclamation of iron tailings.

Key words: Glomus etunicatum, Alfalfa, Iron tailings, Vegetation reclamation, Phosphate, Microbial