期刊论文

Water Release Curves and Their Fitting for Soils in the Hills of the Three Gorges Reservoir

中文

灌溉排水学报

1672-3317

2017

36

9

75-80

10.13522/j.cnki.ggps.2017.09.014

国家自然科学基金项目（41001125） 湖北省自然科学基金重点项目（2015CFA141）

本校为第一机构

为揭示土壤涵养水源的机制,并为山区生态治理提供依据,以三峡库首大老岭和夷陵山地为研究区,采集温性阔叶林棕壤、针阔混交林黄棕壤、茶园地和暖性针叶林黄壤的原状土样,通过离心法分析并拟合了山地土壤的水分特征曲线。结果表明,三峡山地土壤随吸力增大,土壤含水率呈先迅速降低后趋于平缓的变化规律。黄壤的持水性较差,黄棕壤相对于其他林地土壤有着更强的持水性。茶园持水能力比棕壤和黄棕壤差,与黄壤差异较小。孔隙分布随土壤剖面深度的增加而减少。大孔隙以黄壤体积比最大,其次是黄棕壤和棕壤,茶园最小。用 van Genuchten模型拟合山地土壤的水分特征曲线,决定系数R~2均大于0.95,模型可靠性高...

To unravel the mechanism of water holding capacity of soils and improve ecological system management in mountainous areas, we measured the water release curve of intact soil samples taken from Dalaoling and Yiling Mountainsin the Three Gorges of the Yangtze River. The soils examined included subalpine brown soil in temperate deciduous broad-leaved forest, mid-mountain yellow brown soil in the mixed broadleaf-conifer forest, soil intea garden, and low-mountain yellow soil in the warm coniferous forest. The water retention curves were measured us...