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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。
Taking Lu’an mining area in Shanxi Province as the study object, the topsoil of the gangue hillsides in Shanxi Province was studied. The topsoil and organic fertilizer in farmland were proportioned to four kinds of improvers. The results showed that the pH value of the modified matrices changed from the weak acidity (pH 6.23) to near neutrality. The content of available nitrogen reached 41.36 mg / kg, which was 4.61 times of that of the original waste rock. Available phosphorus content up to 10.25 mg / kg, is 3.18 times the original gangue weathered material; available potassium content up to 458.01 mg / kg, which is 2.46 times the original waste rock weathered. The modified matrix material had a significant promoting effect on the main root length, diameter growth and crown growth of Amorpha fruticosa. Through the test analysis of different modified matrix materials, the comprehensive improvement effect of the improved material of 70% gangue weathering material + 15% loess + 15% organic matter is prominent, which has wide applicability and can effectively promote the stable growth of the gangue hill vegetation .