Studies on Plant Rhizosphere Microenvironment Improvement in Mining Area by Inoculating Arbuscular Mycorrhizal Fungi
Large-scale underground coal mining has not only destroyed the surface vegetation, but also seriously damaged the soil of mining area. Bioremediation is one of the highlights in agro-scientific research for soil restoration of mining areas. This experiment systematically studied the effect of arbuscular mycorrhizal fungi on root morphology development, soil characteristics improvement and quantity of rhizosphere microbial populations, through mycorrhizal inoculation on amorpha fruticosa in mining subsidence areas. The results showed that one year after the interval, the inoculation on amorpha fruticosa rhizosphere mycelium density and microbial quantity were significantly higher than the control;the effective phosphorus content of mycorrhizal plants rhizosphere soil increased by 42% compared with the control;the rapidly-available potassium content was increased by 9%~11%;the root system growth of inoculated plants was in good condition;the inoculation on amorpha fruticosa root was 30%~40% higher than the contrast;the root tip number was 10~20 higher, and the total glomalin of rhizosphere soil in inoculated plants was 0.2~0.6 mg/g higher than the control Inoculating arbuscular mycorrhizal fungi on the ground of mining subsidence areas can improve the properties of rhizosphere, and is beneficial to vegetation recovery and stability. This paper has provided theoretical basis for the application and extension of microbial recovery technology.
arbuscular mycorrhizal fungimine land plantrhizosphere microenvironmentimprovement effect