山西潞安矿区矸石风化物基质改良研究

Substrate Amendment in Coal-Gangue Pile in Shanxi Luan Coal Mine

以山西省潞安矿区矸石山表层风化物为研究对象,将农田耕层黄土和有机肥按不同体积比例配比成4种改良剂进行基质改良研究。结果表明:基质改良后的pH值都发生了变化,由原来的弱酸性(pH值为6.23)变为接近中性;速效氮含量最高达到41.36 mg/kg,是原来矸石风化物的4.61倍;速效磷含量最高达到10.25 mg/kg,是原来矸石风化物的3.18倍;速效钾含量最高达到458.01 mg/kg,是原来矸石风化物的2.46倍。改良后的基质材料对紫穗槐的主根长、地径生长和冠幅增长等都有显著的促进作用。通过对不同改良基质材料试验分析得出,70%矸石风化物+15%黄土+15%有机质的改良材料综合改良效果突出,该工艺具有广泛的适用性,能有效地促进矸石山植被的稳定生长。

Research was conducted in the substrate amendment of coal-gangue pile in Luan Coal Mine with the soil from the farm land and organic fertilizer according to the different proportion ratio（volume） into 4 kinds of improver improvement as the soil amendment.After the amendment,the average pH value of substrate was regulated from 6.23 to neutral;nitrogen content reached 41.36 mg/kg,4.61 times higher than that of the control;available phosphorus content reached 10.25 mg/kg,3.18 times higher than that of the control,available potassium content reached 458.01 mg/kg,2.46 times higher than that of the control,which greatly motivated the taproot of height,ground diameter growth and crown diameter growth of Amorpha fruticosa.Statistics and experimental result showed that matrix：70% coal-gangue＋15% soil＋15% organic fertilizer had significant amending effects on the substrate.It was an effective access to conduct the substrate amendment to coal-gangue piles and also one of the best ways to reutilize the solid waste disposal rationally.