摘要
通过离心机法测定了黄河源头不同土层的高山草原土土壤水分特征曲线,并将实验结果拟合为经验公式。结果表明:各层土壤水分特征曲线整体趋势均表现为快速下降—缓慢下降—基本平稳,但不同土层的土壤持水性有较大的差异;用Van-Genuchten方程可较好地反映该土壤含水量与土壤水势之间的数量关系,拟合方程的相关系数均大于0.99。
The soil water characteristic curves(SWCC) were measured by using centrifugal method for alpine steppe soil of different soil layers in the Yellow River headwaters region.The results were modeled into empirical formula.The SWCC at different soil layers showed a trend of fast descending-slow descending-basically stable.But there is a large difference on different layers of soil water holding capacity.The relationship between soil water content and soil water potential could be successfully described by Van-Genuchten equation,and the correlation coefficient is over 0.99.
出处
《青海大学学报（自然科学版）》
2013年第2期17-20,共4页
Journal of Qinghai University(Natural Science)
基金
国家自然科学基金资助项目(41061024)
