中文摘要：

通过野外调查确定研究区域和样本植物，然后分别在地下煤炭开采前和开采后定点采集植物根际土壤样本，通过实验分析研究神东矿区补连塔煤矿地下煤炭开采引起的地表采动裂缝对青杨根际环境的影响。结果表明，青杨根际微生物区系中。细菌数量最多，放线菌数量次之，真菌数量最少；青杨根际微生物数量、酶活性、土壤含水量、pH值呈现明显的季节分布规律。地表裂缝降低了青杨根际的微生物数量、酶活性、菌丝密度、菌根侵染率、土壤含水量和电导率。随着时间的推移，地表裂缝对青杨根际环境的影响有逐步减弱的迹象。

英文摘要：

By means of the field investigation, the study area and sample plant were determined in Bulianta coal mine of Shendong Area. And then soil samples in rhizosphere were collected before and after underground coal mining. Through the analyses on experimental data, the effects of surface cracks caused by underground coal mining on the rhizospheric microhabitat of Populus cathayana are analyzed. The results indicate that for the rhizosphere of Populus cathayana, in terms of quantity, bacteria, actinomycetes, and fungi are in a descending order. There is a significant distribution precept of the microorganism amount, enzyme activity, and water content of soil and pH value in different seasons. The surface cracks reduce microorganism quantities, enzyme activities, hyphal density, mycorrhizal infection rate, soil water content, and electrical conductivity of soil in the rhizosphere of Populus cathayana. With the time goes by, the effects of surface cracks on the rhizospheric microhabitat of Populus cathayana are gradually weakening.