煤矸石充填复垦对土壤特性影响研究

为实现矿区可持续发展，以潘一矿复垦区土壤为研究对象，选择土壤含水率、容重、pH值、有机碳、速效钾、速效磷和全氮7项指标对煤矸石充填复垦土壤特性及肥力水平进行评价。结果显示：与对照区土壤特性相比，潘一矿复垦区土壤含水量、有机质、速效钾、速效磷、全氮含量偏低。但是土壤容重较大，pH值略高显弱碱性。在土壤剖面上，这7种指标在各层含量差异不大。潘一矿复垦区土壤营养元素中有机质和速效磷比较缺乏，特别是有机质含量严重缺乏。风化后的煤矸石对土壤有一定增肥作用。但是，由于煤矸石偏碱性和含盐量较高特点，容易引起接触层土壤发生盐化现象．应当引起重视。

Study on Influence of Gangue on Reclaimed Soil Properties

In order to achieve sustainable development of mining area, the soil in reclamation area of Panyi Coal Mine was taken as research object, selecting soil moisture content, bulk density, pH value, organic carbon, a-vailable potassium, available phosphorus and total nitrogen as the seven indicators to evaluate properties of soil reclaimed with gangue backfilling and its fertility levels. The results showed that comparing with the control soil, in the soil in reclamation area of Panyi Coal Mine soil moisture, organic matter, available potassium, availablephosphorus, total nitrogen content is lower. But the soil bulk density is bigger, and pH value presents shghtly noticeable alkaline. In the soil profile, the contents of the seven indicators have little difference in different lay- ers. In the nutrients in the reclamation soil of Panyi Coal Mine, the organic matter and available phosphorus are relatively lacking, especially organic matter content sorely lacking. After weathering, gangue has some effect of increasing fertility for soil. However, since the gangue is alkaline and has high salt content, easy to cause soil salinization in the contacting layer, which should be paid attention.