南方红壤区土地利用方式对土壤水分入渗特性的影响
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S152.7

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中国科学院前瞻战略科技先导专项(A类)子课题“红壤结构改良与季节性干旱适应原理及技术”(XDA0440202); 国家自然科学基金项目“土壤结构对红壤农田小流域水文过程影响的模拟研究”(42077012),“土壤结构调节红壤干热复合灾害的潜能与机制”(42477323)。


Effects of land use patterns on water infiltration in red soil region of southern China
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    [目的] 研究红壤区土地利用方式对土壤水分入渗性能的影响,为该区水土保持与土地利用规划提供科学依据。[方法] 使用双渗环测定了林地、灌丛、草地、花生地、玉米地和裸地等6种土地利用方式的土壤的水分入渗特征,并运用Philip模型、Kostiakov模型、Horton模型和Mezencev等4种模型模拟水分入渗过程,比较不同土地利用方式下的土壤水分入渗特征差异,探讨土壤物理性质对土壤入渗性能的影响。[结果] ①红壤的初始、平均及稳定水分入渗速率分别为3.50~41.93 mm/min,2.03~28.37 mm/min,1.28~17.15 mm/min,这些水分入渗特征值在不同土地利用方式下的差异均表现为:林地>裸地>灌丛>玉米地>草地>花生地; ②Kostiakov模型模拟红壤入渗过程的效果最佳,在6种土地利用方式中的R2为0.91~0.99,而Horton和Mezencev模型分别适合模拟草地和花生地土壤的水分入渗过程,R2分别为0.93,0.91,Philip模型模拟红壤水分入渗过程的效果较差; ③影响红壤水分入渗特征值的物理因素包括非毛管孔隙度、自然含水率和黏粒含量,贡献度分别为25.80%~32.30%,19.20%~21.20%和16.30%~20.70%。[结论] 不同土地利用方式下的红壤水分入渗性能存在差异,其中,林地土壤的入渗性能较好。建议在水土保持过程中实施农林复合措施,改善红壤区农用地土壤的水分入渗性能。

    Abstract:

    [Objective] The impacts of the land use patterns on the water infiltration in red soil regions were studied to provide a scientific basis for soil and water conservation as well as land use planning. [Methods] A double-ring infiltrometer was used to quantify the water infiltration characteristics in red soils under six land use patterns: forest land, shrubland, grassland, peanut cropland, maize cropland, and bare land. Four infiltration models (Philip, Kostiakov, Horton, and Mezencev) were used to simulate infiltration process. The differences in the water infiltration characteristics were compared among the land use types, and the influence of the physical properties of the soil on the water infiltration capacity was systematically investigated. [Results] ① The initial, average, and steady infiltration rates of the red soil ranged from 3.50 to 41.93, 2.03 to 28.37, and 1.28 to 17.15 mm/min, respectively. The water infiltration capacity decreased as follows: forest land > bare land > shrubland > maize cropland > grassland > peanut cropland; ② The Kostiakov model most accurately simulated the red soil infiltration processes among the four models, with an ranging from 0.91 to 0.99 for all land use pattern. In contrast, the Horton and Mezencev models were particularly accurate in modeling the water infiltration of grandland and peanut cropland, with R² values of 0.93 and 0.91, respectively. The accuracy of the Philip model in modeling the water infiltration was relatively low. ③ The key physical factors influencing the water infiltration were the noncapillary porosity, natural moisture content, and clay content, which contributed 25.80% to 32.30%, 19.20% to 21.20%, and 16.30% to 20.70% of the total water infiltration capacity. [Conclusion] The water infiltration capacity of red soils varies widely across different land use pattern, with that under forest land being the highest. Certain agroforestry practices should be implemented to increase the water infiltration capacity of agricultural red soils to conserve soil and water.

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冯凯悦,李进林,韦杰,黄平,朱绪超,高磊,马雪莹.南方红壤区土地利用方式对土壤水分入渗特性的影响[J].水土保持通报,2025,45(5):135-143,154

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  • 收稿日期:2025-05-12
  • 最后修改日期:2025-06-26
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  • 在线发布日期: 2025-11-07
  • 出版日期: 2025-10-18