民勤绿洲区固沙林土壤理化性质时空变异分析

发布时间：2018-12-07 19:22

【摘要】：以不同树种和不同林龄固沙林为研究对象,采用野外典型抽样调查和室内分析测定相结合的方法,研究了民勤绿洲区不同固沙林对土壤理化性状的影响。结果表明:不同树种固沙林0~20 cm土层土壤含水量均显著大于裸沙地的,而40~60 cm土层土壤的含水量小于裸沙地的;0~60 cm土层的裸沙地土壤容重、pH值比林地大,而土壤有机质、全氮、全磷、全钾、碱解氮、有效磷、速效钾含量比林地小;0~60 cm土层的不同树种固沙林土壤含水量、容重、pH值随土层深度增加而增大,土壤有机质、全氮、全磷、全钾、碱解氮、有效磷、速效钾含量随土层深度增加而减小;不同林龄的固沙林树种中,梭梭林的土壤容重、pH值均随林龄的增长先减小后增大,而土壤含水量、有机质、全氮、全磷、碱解氮、有效磷、速效钾含量则随林龄的增长先增大后减小。固沙林地的土壤理化性质比裸沙地有很大改善。
[Abstract]:The effects of different tree species and different forest ages on soil physical and chemical properties in Minqin oasis were studied by using field typical sampling survey and laboratory analysis. The results showed that the soil water content of 0 ~ 20 cm soil layer of different tree species was significantly higher than that of bare sandy land, while the soil moisture content of 4060 cm soil layer was lower than that of bare sandy land. The soil bulk density of bare sandy land in 0 ~ 60 cm soil layer was larger than that of forest land, while the content of organic matter, total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus and available potassium in soil were lower than that in forest land. Soil water content, bulk density and pH value of different tree species in 0 ~ 60 cm soil layer increased with the increase of soil depth. Soil organic matter, total nitrogen, total phosphorus, total potassium, alkali-hydrolyzed nitrogen, available phosphorus and available potassium decreased with the increase of soil depth. The soil bulk density and pH value of Haloxylon ammodendron forest decreased first and then increased with the increase of forest age, but soil water content, organic matter, total nitrogen, total phosphorus, alkali-hydrolyzed nitrogen, available phosphorus, total nitrogen, total phosphorus, soil water content, total nitrogen, total phosphorus, total nitrogen, available phosphorus, total soil water content, total nitrogen, total phosphorus, The available potassium content increased first and then decreased with the increase of forest age. The soil physical and chemical properties of sand fixation woodland are much better than that of bare sandy land.
【作者单位】：甘肃省水土保持科学研究所;甘肃农业大学资源环境学院;河南理工大学资源环境学院;
【基金】：甘肃省青年科技基金资助项目(1506RJYA177) 甘肃省自然科学基金资助项目(1308RJZA237) 甘肃省水利重点科研计划项目
【分类号】：S714.2

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