【摘要】 在进行黑岱沟人工复垦地生态环境调查的基础上,对露天煤矿排土场土壤进行了理化性质、微生物及营养成分等项目的系统测试,选择了有机质、全氮、全磷、全钾、碱解氮、速效磷、速效钾、土壤水分、土壤容重、pH值、土壤3大微生物及固氮菌等项目作为评价指标,应用灰色关联度法对露天煤矿排土场土壤质量进行综合评价。结果表明:黑岱沟露天煤矿复垦区土壤质量以三等居多,四等次之,无一、二、五等;排序顺序为:各种果树(0.7209)>油松×柳×沙棘(0.7058)>锦鸡儿(0.6602)>羊草0.6165>纯杨林(人工)(0.565)≈杨林(原生)(0.556),油松林(0.5421)>杨×沙棘(0.5352)>对照(0.5154)。更多还原

【Abstract】 On the basis of the investigation of the reclaimed land environments,the physical and chemical characters,and nutrient components of reclaimed land soil in the Hei-Dai-Gou opencast coal mine of Loess Plateau were tested.Qualities of soils with different reclamation measures were systematically evaluated.Evaluation indexes include organic matter,total N,total P,total K,available N,available P,available K,soil moisture,soil bulk density,pH value,three major soil microorganisms and nitrogen-fixing bacteria.Correlation analysis based on Grey System Theory was used in soil quality evaluation.The results showed that soils in most reclaimed lands in the Hei-Dai-Gou opencast coal mine of loess plateau were turning into the benign circulation categories of grade three or grade four.No other categories(grade one,two and five) in the region were found.The order of quality evaluation were as follow: orchard(0.7209)> Pinus tabulaeformis×Salix matsudana×Hippophae rhamnoides(0.7058)>Caragana intermedia(0.6602) >Leymus chinensis(0.6165)> Populus simonii(artificial)(0.565)≈Populus simonii(pristine)(0.556);Pinus tabulaeformis(0.5421)>Populus simonii×Hippophae rhamnoides(0.5352)> contrast(0.5154).更多还原