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煤炭的大规模地下开采不仅破坏了地表植物,而且对矿区土壤造成了严重影响。微生物修复技术是矿区土壤修复的研究热点之一,通过在采煤沉陷区紫穗槐接种菌根真菌,系统地研究菌根对紫穗槐根系形态的发育,对土壤性状的改良以及根际微生物种群数量的影响。结果表明,间隔一年后,接菌紫穗槐根际土壤菌丝密度和微生物数量显著高于对照;菌根植物根际土壤有效磷含量比对照增加42%,速效钾含量比对照增加9%~11%;菌根植物的根系发育状况良好,接菌紫穗槐根长比对照高30%~40%,根尖数多10~20个,根际土壤总球囊霉素接菌植物比对照高0.2~0.6 mg/g。在采煤沉陷地上接种丛枝菌根真菌,可改善根际土壤的性状,有利于地表植被的恢复与稳定,为微生物修复技术的推广应用奠定了一定的理论基础。
Large-scale underground mining of coal has not only damaged the surface plants, but also has a serious impact on the mining soil. Microbial remediation technology is one of the hotspots of research on soil remediation. By inoculating mycorrhizal fungi in Amomum acuminatum mining subsidence area, the mycorrhizal colonization of Amorpha fruticosa root morphology, the improvement of soil properties, The impact of population numbers. The results showed that the mycelial density and the number of microbes in the rhizosphere soil of the inoculated Amorpha fruticosa were significantly higher than those in the control one year after the start of the experiment. The content of available phosphorus in the rhizosphere soil of the mycorrhizal plant increased by 42% and that of the available potassium by 9% ~ 11%. The root system of mycorrhizal plants was well developed. The root length of inoculated amorpha fruticosa was 30-40% higher than that of the control, and the number of root tips was 10-20. Control high 0.2 ~ 0.6 mg / g. Arbuscular mycorrhizal fungi inoculated on coal mining subsidence can improve the characters of rhizosphere soil, which is beneficial to the recovery and stability of surface vegetation, which has laid a theoretical foundation for the popularization and application of microbial remediation technology.