不同植被对土壤理化性质影响——以王东沟小流域为例  

Impacts of Vegetation Cover on Soil Physic-chemical Properties——A Case Study in Wangdonggou Watershed

作　　者：杨亚辉[1,2] 赵文慧[3] 木热提江.阿不拉 蔺鹏飞[1,2] 于艺鹏 陈利利[3] 张晓萍[1] 

机构地区：[1]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 [2]中国科学院大学,北京100049 [3]西北农林科技大学资源与环境学院,陕西杨凌712100

出　　处：《水土保持通报》2016年第1期249-252,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"流域水沙对LUCC响应"(41440012);"气候变化背景下黄土高原土地利用影响径流的空间尺度效应"(41230852);"北洛河水沙动态过程及对退耕还林(草)响应机理"(41101265)

摘　　要：[目的]分析陕西省长武县王东沟流域9个径流小区不同植被覆盖条件对土壤理化性质的影响,为黄土高原生态建设提供科技支持。[方法]采用环刀法、定水头法以及重铬酸钾外加热法等分层测定0—40cm间土壤容重、毛管持水量、饱和持水量、饱和倒水率以及有机质含量。[结果]饱和持水量、毛管持水量、土壤有机质表现为草、灌地显著优于纯林和混交林,而土壤容重、饱和导水率各小区间差异不显著。[结论]草地和沙棘灌木林地土壤理化性质高于其他植被组合,培肥土壤,涵养水源,利于保水保土。侧柏纯林的土壤理化性质最差,水保效益最低。[Objective]Nine runoff plots with various vegetation covers in the Wangdonggou watershed in Shaanxi Province were selected to analyze the effects of vegetation cover on the soil physical and chemical properties in order to provide support for ecological construction in Loess Plateau.[Methods]Soil bulk density was measured by using the cutting ring.Soil saturation moisture,the capillary moisture and the saturated hydraulic conductivity was measured by the constant head method.Soil organic were analyzed by the potassium dichromate external heating method.[Results]It showed that saturation moisture,capillary moisture,soil organic matter in grass and shrub land were significantly higher than that in the pure and mixed woodlands,while there was no significant change in soil bulk density and saturated hydraulic conductivity.[Conclusion]Grass combined with shrub are beneficial to maintain soil nutrition,keep water,and conserve soil.Platycladus orientali woodland are worse in improving physic-chemical properties and soil and water conservation.

关 键 词：黄土塬区 植被覆盖 土壤理化性质 水保效益 

分 类 号：S714.2[农业科学—林学]