丛枝菌根对采煤沉陷区紫穗槐生长及土壤改良的影响

 丛枝菌根技术是目前矿区生态修复的重要手段之一。通过向紫穗槐接种丛枝菌根（AM），研究接种后2~14 个月间菌根对紫穗槐生长和土壤改良的影响。结果表明，与不接种相比，接种AM 极显著提高植物成活率7.2%~9.7%，株高极显著增加34%~62%、冠幅极显著增加39%~65%；极显著提高菌根侵染率16%~21%，极显著提高菌丝密度50%~70%；菌根侵染率、菌丝密度与土壤有机碳、全氮、速效磷、速效钾、碱解氮含量显著或极显著正相关；接种AM 能够显著降低土壤pH 值，提高土壤有机碳、全氮、速效磷、速效钾、碱解氮含量；球囊霉素相关土壤蛋白是土壤有机质的重要组成部分，可以灵敏反映土壤质量的变化。接种AM能够促进采煤沉陷区紫穗槐的生长发育和土壤改良。

Effects of Arbuscular Mycorrhiza on Growth of Amorpha Fruticosa L. and Soil Improvement in Coal Mining Subsidence Area

Arbuscular mycorrhizal technology is one of the important means for ecological restoration in mining areas. In this paper, effects of the arbuscular mycorrhizal (AM) inoculation on the growth and development of Amorpha Fruticosa L. and soil quality were studied between 2 and 14 months post-inoculation. The results showed that compared with that of the non-inoculated Amorpha Fruticosa L., the survival rate of inoculated one increased by 7.2%-9.7%, the plant height markably increased by 34%-62%, the crown diameter significantly increased by 39%-65%, the mycorrhizal infection rate significantly increased by 16%-21%, and the hyphal density increased by 50%-70%. The mycorrhizal infection rate and hyphal density had significantly or highly significantly positive correlations with contents of organic carbon, total nitrogen, available phosphorus and potassium, alkali-hydrolyzable nitrogen in the soil. The soil pH significantly decreased, and the contents of soil organic carbon, total nitrogen, available phosphorus and potassium, alkali-hydrolyzable nitrogen significantly increased by the inoculation of mycorrhiza. Glomalin related soil protein is an important composition of organic matter in soil, which can reflect small changes of soil quality. These results show that AM can promote growth and development of Amorpha Fruticosa L. and soil improvement in coal mining subsidence areas.