陕北风蚀水蚀交错区不同植被下土壤入渗性能差异性研究  

Soil Infiltration Under Different Vegetations in Water-wind Erosion Crisscross Region of Northern Shaanxi Province

作　　者：陈致富[1] 魏天兴[1] 赵健[1] 郑江坤[1] 夏菁[1] 

机构地区：[1]北京林业大学水土保持学院/水土保持与荒漠化防治教育部重点实验室,北京100083

出　　处：《水土保持学报》2009年第3期232-235,共4页Journal of Soil and Water Conservation

基　　金：国家"十一五"科技支撑计划项目(2006BAD03A1206)

摘　　要：针对风蚀水蚀交错典型地区不同植被类型（山杏、沙棘、油松、河北杨林等）,采用改进的土壤入渗过程测定仪对林地土壤进行了持水性能和入渗性能的实测研究。结果表明,森林群落的蓄水能力和入渗性能均好于灌丛群落和草本群落。非毛管孔隙度是土壤蓄水能力的主要决定因素,数值上森林群落和灌丛群落为草本群落的1.09～1.49倍。土壤的初渗率在1.26～27.66 mm/min,稳渗率在5.95～19.86 mm/min,总体上是森林群落〉灌丛群落〉草本群落,具体表现为小叶杨山杏混交林〉河北杨〉山杏〉河北杨＋沙棘〉油松＋小叶杨＋山杏〉油松〉荒草地。土壤入渗的回归方程表现为幂函数形式,回归系数在0.91～0.98,拟合效果好。该研究结果为评价陕北风蚀水蚀交错区不同植被类型下土壤持水能力和入渗性能提供了重要参考。By using the improved soil infiltration process determinator, we have studied the soil retaining capacity and infiltration under different vegetation in water-wind erosion crisscross tipieal region of Shannxi Province. The results show that：the soil retaining capacity and soil infiltration of forest community is superior to that of shrub community and herb community. Soil non-capillary porosity is the major determinant, and, its value of forest community 1.29-7.63 times that of shrub community and herb community. Soil initial infiltration rates are beween 1.26-27. 66 mm/rnin, and soil steady infiltration rates are between 5.95- 19.86 mm/min. The infiltration rates of different vegetations are ranked as follows： Leaflet poplar＋Prunus armeniaca〉 Hebei poplar〉 Prunus armeniaca 〉 Hebei poplar＋ Seabukthorn〉Chinese pine＋Leaflet poplar＋ Prunus arrneniaca〉Chinese pine〉Waste-grassland. Soil infiltration regression equation performs exponent relation.

关 键 词：风蚀水蚀交错区 土壤物理性质 蓄水能力 入渗性能 

分 类 号：S152.72[农业科学—土壤学]