采煤塌陷区土壤养分流失规律研究

[目的]以兖州兴隆庄镇塌陷地为研究对象,研究土壤养分在塌陷坡面和垂直剖面的流失变化规律。[方法]通过野外调查取样和室内分析,测定土壤不同空间结构的迟效养分和速效养分。[结果]在坡面方向,由坡顶到塌陷中心点,迟效养分和速效养分都发生了迁移流失,其中速效养分流失更明显。在垂直剖面上,在0～40 cm深度,碱解氮和速效磷流失较大,分别高达37.91%和23.68%。[结论]在地表,塌陷中心点发生养分富集现象;在60 cm深度之下,土壤养分含量基本不变,判定此深度为该塌陷区养分的影响深度。

Study on Soil Nutrient Loss of Coal Mining Subsidence Area

[Objective]Taking coal mining subsidence area in Xinglongzhuang Town as an example,the research aimed to study the changes of soil nutrient in the slope and vertical direction.[Method]Through survey sampling and laboratory analysis,the contents of slowly available and available nutrient of soil were tested.[Result]In the slope direction,the slowly available and available nutrient ran off from the top of slope to the bottom,and the loss of available nutrient was more serious.In the vertical direction,the available nitrogen and rapidly available phosphorus ran off obviously.The loss of available nitrogen and rapidly available phosphorus were up to 37.91% and 23.68% respectivly in the depth of 0-40 cm.[Conclusion] The nutrient enriched in the bottom of slope.Under the depth of 60 cm,the content of soil nutrient changed a little,so it was judged as the effective depth.