丛枝菌根真菌对采煤塌陷地玉米生长的影响

Effects of Arbuscular Mycorrhizal Fungi on the Growth of Maize in Mining Subsidence

[目的]探讨丛枝菌根真菌对采煤塌陷地玉米生长的影响。[方法]针对西部采煤塌陷地干旱缺水和土地生产力低下的特点,研究了接种从枝菌根真菌对玉米生长的影响,以及对采煤塌陷区退化土壤微环境的作用效果。[结果]接种从枝菌根真菌促进了玉米的生长,提高了玉米植株和籽粒干重;接种组玉米对土壤速效磷和速效钾的利用率明显提高;接种菌根真菌增强了退化土壤中酸性磷酸酶的活性,同时玉米根际土壤微生物数量增加显著;所选G.a菌提高了玉米根系的侵染率和根际土壤菌丝密度。[结论]所选丛枝菌根真菌适合在采煤塌陷地上推广应用,并具有较高的生态价值。

[Objective] The study aimed to discuss the effects of arbuscular mycorrhizal fungi on the growth of maize in mining subsidence.[Method] Based on the characteristics of water shortage and low productivity of land in western mining subsidence of China,the influence of arbuscular mycorrhizal fungi inoculation on the growth of maize and micro-environment of the degraded soil was analyzed.[Result] Arbuscular mycorrhizal fungi promoted the growth of maize and increased maize production ; the utilization rates of soil phosphorus and potassium by inoculated maize were significantly increased; arbuscular mycorrhizal fungi inoculation enhanced the activity of acid phosphatase in the degraded soil,while microbial biomass in maize rhizosphere increased significantly; Glomus aggregatum （G.a） increased the infection rate of roots and hyphal density in maize rhizosphere.[Conclusion] Arbuscular mycorrhizal fungi is applicable to mining subsidence and will have a high ecological value