摘要
研究了缙云山常绿阔叶林下土壤饱和导水率和土壤大孔隙的关系. 结果表明: 饱和导水率具有较大的空间变异性, 变异系数达67%; 其大小不仅取决于总孔隙度, 更主要取决于能导水的大孔隙的数量和大小. 饱和导水率的变化对大孔隙变化具有高度依赖性, 且与半径大于0 1 cm的大孔隙体积有较好的相关性.
The infiltration ability is important to soil hydrology. The soil macropore is common in and has very important impacts on soil infiltration. In this paper, the relationship between the saturated hydraulic conductivity and soil macropore in evergreen broad-leaved forest of Yinyun Mountain was studied. The result shows that the saturated hydraulic conductivity has great spatial variability with the various coefficient 67%, and the soil bulky density has lower variability. The saturated hydraulic conductivity not only be decided by total porosity but also be decided chiefly by the number and volume of macropore that could transmit water. The variety of the saturation highly depends on the variety of macropore, and it has good association with the volume of soil macropore that radius is larger than 0.1 cm.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第2期350-353,共4页
Journal of Southwest China Normal University(Natural Science Edition)
基金
国家重点基础研究发展规划资助项目(2002CB111504)
国家杰出青年基金资助项目(30125036)
国家自然科学基金资助项目(40471078).
关键词
大孔隙
水分穿透曲线
饱和导水率
入渗性能
macropore
water-breakthrough-curve
saturated hydraulic conductivity
infiltration
