太行山区土壤饱和导水率及其各向异性剖面分布规律
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S152.7

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国家自然科学基金项目(41930651),河北省省级水利科技计划项目(2024-37)和中国科学院青年创新促进会项目(2020102)资助。


Profile Distributions of Soil Saturated Hydraulic Conductivity and Its Anisotropy in Taihang Mountain Area
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National Natural Science Foundation of China, No. 41930651; Provincial Water Science and Technology Project of Hebei Province (2024-37); Supported by Youth Innovation Promotion Association, Chinese Academy of Sciences (No. 2020102)

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    摘要:

    通过测定太行山区典型坡地3个坡位不同土壤层次垂直与水平方向上的土壤饱和导水率(Ks)、毛管孔隙度、总孔隙度、含水量、容重、机械组成、有机质含量等基本性质,应用相关分析等方法,研究了Ks及其他土壤性质的剖面分布特征,深入探讨了Ks各向异性比的垂直分布规律及其成因。结果显示:上坡位和下坡位Ks在垂直和水平方向上均随土壤深度的增加而先增大后减小;中坡位Ks在垂直方向上随土壤深度的增加先增大后减小,而水平方向上随土壤深度的增加先减小后增大。上、中、下3坡位Ks各向异性比均与1呈明显差异,表现出明显的各向异性,且上、下坡位水平方向Ks占主导,而中坡位垂直方向Ks占主导地位。相关分析结果表明,Ks各向异性比与土壤容重呈显著负相关(r= -0.492,P=0.017),与总孔隙度、毛管孔隙度呈显著正相关(r= 0.546、P=0.007;r=0.543、P=0.007),与其他土壤理化性质相关性不显著,土壤孔隙结构是Ks各向异性比最重要的影响因素。

    Abstract:

    In this study, soil saturated hydraulic conductivity (Ks), capillary porosity, total porosity, water content, bulk density, particle composition, organic matter content and other basic physical properties were measured in different vertical and horizontal directions of three typical slopes in Taihang Mountain, and correlation analysis was used to study the profile distribution of Ks and other soil properties. At the same time, the vertical distribution of Ks anisotropy ratio and its causes were discussed. The results showed that Ks in the upper and lower slopes increased first and then decreased with the increase of soil depth in both vertical and horizontal directions. Ks in the middle slope increased first and then decreased with the increase of soil depth in the vertical direction, but decreased first and then increased with the increase of soil depth in the horizontal direction. Ksanisotropy ratio of the upper, middle and lower slopes were significantly different from that of 1, showing obvious anisotropy. Ks was dominant in the horizontal direction of the upper and lower slopes, while dominant in the vertical direction of the middle slope. Correlation analysis showed that Ksanisotropy ratio was negatively correlated with soil bulk density (r= -0.492, P=0.017), positively correlated with soil total porosity and capillary porosity (r= 0.546, P=0.007; r=0.543, P=0.007), while insignificantly correlated with other soil physiochemical properties, indicating that soil pore structure was the most important factor affecting Ks anisotropy ratio.

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陈天明,张子元,安雪景,付宇航,刘金铜,付同刚.太行山区土壤饱和导水率及其各向异性剖面分布规律[J].土壤,2025,57(3):657-663. CHEN Tianming, ZHANG Ziyuan, AN Xuejing, FU Yuhang, LIU Jintong, FU Tonggang. Profile Distributions of Soil Saturated Hydraulic Conductivity and Its Anisotropy in Taihang Mountain Area[J]. Soils,2025,57(3):657-663

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  • 收稿日期:2024-05-23
  • 最后修改日期:2024-06-27
  • 录用日期:2024-07-04
  • 在线发布日期: 2025-07-08
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