接种菌根对神东矿区采煤沉陷地的生态修复效应

Ecological Reclamation Effect of Arbuscualr Mycorrhizal Inoculum on Subsided Land in the Area of Shendong Coal Mine

丛枝菌根真菌技术对采煤沉陷区进行土地微生物修复是目前研究的热点之一。本文以神东采煤沉陷区种植的紫穗槐接种丛枝菌根真菌为研究对象,经16、25和28个月监测和对接种菌丝密度与土壤有效磷含量的相关性分析,表明接种对植物生长和根际土壤理化性状产生的一定影响。回归分析方法表明,接种菌菌丝密度与有效磷含量随着时间的推移逐渐降低,而对照逐渐呈现正相关性;不同的监测时间相关性不同,如9月的菌丝密度与有效磷含量的相关性优于6月的,这与菌根发育时间密切相关。神东矿区采煤沉陷地紫穗槐试验结果证明,接种菌根真菌能够在宏观上有效地促进紫穗槐生长和发育,在微观上改良植物生长的基质条件。

Currently, arbuscular mycorrhizal fungi technology becomes one of the hotspots in the research on land microbial remediation for mining subsidence. Taking amorpha fruiticosa planting in the mining subsidence of Shendong mining area as a study object, AMF vaccinated on amorpha fruiticosa after 16 months, 25 months, and 28 months, respectively are used to analyze its effect on the growth of plant and on rhizosphere soil physical properties. And then the correlation between hyphae density and effective phosphorus of rhizosphere is analyzed. By using regression analysis, it is indicated that in different monitoring time, for example, hyphae density and effective phosphorus in September had better linear fitting than that in June, which is closely associated with development time of mycorrhizal. With the time passing by, the correlation of vaccination between hyphae density and effective phosphorus content is gradually decreased; however, the positive correlation of un-vaccinated is gradually emerged. The results of mycorrhizal bioremediation on mining subsidence in Shendong mining area prove that vaccination not only could effectively promote growth and development of amorpha fruiticosa in macrosconic, but also could improve the growth matrix conditions in microscopic.