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以神东矿区采煤塌陷裂缝为研究对象,分析了阴坡以及阳坡塌陷裂缝对土壤碱解氮、速效磷、速效钾含量的影响。结果表明:裂缝对3种速效养分的影响均达到显著水平(P<0.01),塌陷裂缝使原本由坡顶向坡底迁移的速效养分在裂缝处中断,大量流失,流失率范围为42.17%~10.53%,裂缝对阴坡的影响更大,表层土比下层土受影响更大,裂缝对碱解氮的影响程度大于速效磷大于速效钾。
Taking the coal mining subsidence cracks in Shendong Mining Area as the research object, the influences of the shady slope and the subsidence cracks in the sunny slope on the contents of soil available nitrogen, available phosphorus and available potassium were analyzed. The results showed that the effect of the fractures on the three available nutrients were all significant (P <0.01). The collapses caused the discontinuous breakdown of the available nutrients that migrated from the top of the slope to the bottom of the slope, with a large loss. The loss rate ranged from 42.17% 10.53%. The cracks have a greater impact on the shady slopes. The surface soil is more affected than the lower soil. The effect of fractures on available nitrogen is greater than that of available phosphorus.