石漠化区退耕驱动下露石岩-土界面土壤渗透特性变化

刘婷婷; 戴全厚; 彭旭东; 岑龙沛; 许胜兵

doi:10.13870/j.cnki.stbcxb.2022.06.012

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石漠化区退耕驱动下露石岩-土界面土壤渗透特性变化

更新时间：2025-03-12

- 石漠化区退耕驱动下露石岩-土界面土壤渗透特性变化
- Variation of Soil Infiltration Characteristics at Rock-Soil Interface Driven by Returning Farmland in Rocky Desertification Area
- 水土保持学报 2022年36卷第6期页码：88-94
- 作者机构：
  
  1. 贵州大学林学院,贵阳,550025
  2. 贵州大学土壤侵蚀与生态修复研究中心,贵阳,550025
- 作者简介：
- 基金信息：
  
  贵州省科技计划项目(黔科合基础[2020]1Y176);国家自然科学基金项目(42007067);贵州省普通高等学校青年科技人才成长项目(黔教合KY字[2021]082);贵州省高层次创新型千层次人才项目;贵州省一流学科建设项目(GNYL[2017]007);贵州大学培育项目(贵大培育[2019]36号)
- DOI：10.13870/j.cnki.stbcxb.2022.06.012
  中图分类号： S152.7
- 纸质出版：2022
- 稿件说明：
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刘婷婷, 戴全厚, 彭旭东, 等. 石漠化区退耕驱动下露石岩-土界面土壤渗透特性变化[J]. 水土保持学报, 2022,36(6):88-94.

LIU Tingting, DAI Quanhou, PENG Xudong, et al. Variation of Soil Infiltration Characteristics at Rock-Soil Interface Driven by Returning Farmland in Rocky Desertification Area[J]. 2022, 36(6): 88-94.
刘婷婷, 戴全厚, 彭旭东, 等. 石漠化区退耕驱动下露石岩-土界面土壤渗透特性变化[J]. 水土保持学报, 2022,36(6):88-94. DOI： 10.13870/j.cnki.stbcxb.2022.06.012.

LIU Tingting, DAI Quanhou, PENG Xudong, et al. Variation of Soil Infiltration Characteristics at Rock-Soil Interface Driven by Returning Farmland in Rocky Desertification Area[J]. 2022, 36(6): 88-94. DOI： 10.13870/j.cnki.stbcxb.2022.06.012.

摘要

为揭示退耕对石漠化区露石岩—土界面土壤渗透特性的影响

以典型石漠化坡耕地为对照

选择休闲地、退耕灌草和果园为研究对象

采用环刀法研究了平直、外凸和内凹型露石岩—土界面土壤渗透特性。结果表明:(1)不同退耕类型岩—土界面土壤入渗过程及特征差异较大

从初始入渗率到稳定入渗率衰减幅度在0.350~55.756 mm/min

而不同岩—土界面形状间土壤入渗速率差异较大;(2)不同退耕类型岩—土界面土壤入渗速率的主要影响因素为毛管孔隙度和非毛管孔隙度

初始入渗率、平均入渗率和稳定入渗率均与毛管孔隙度呈极显著负相关(p＜0.01)

而初始入渗率与非毛管孔隙度呈显著正相关(p＜0.05);(3)与Kostiakov模型和Philip模型相比

Horton模型对不同退耕类型岩—土界面土壤入渗过程拟合适用性最好

可以更好地模拟和预测不同退耕类型岩—土界面土壤入渗过程和入渗能力;(4)主成分分析评价不同退耕类型岩—土界面土壤入渗能力大小为坡耕地(0.99)＞休闲地(0.16)＞退耕灌草地(-0.43)＞退耕果园(-0.72)。退耕明显降低石漠化区露石岩—土界面土壤入渗能力

这种降低在外凸型岩—土界面最为显著。研究结果可为深入认识退耕对石漠化区岩—土界面水分渗漏提供科学依据。

Abstract

In order to reveal the effect of returning farmland on the soil infiltration characteristics of the outcrop rock-soil interface in the rocky desertification area

the arable land was taken as the control

and the fallow field

farmland return to shrubs grassland and orchard were selected as the research objects

and the soil infiltration characteristics of rock-soil interface with different shapes of straight

convex and concave were studied through the ring knife method. The results showed that: (1) The soil infiltration process and characteristics at the rock-soil interface of different types of returning farmland varied greatly. From the initial infiltration rate to the stable infiltration rate

the attenuation range was between 0.350 mm/min and 55.756 mm/min

and the soil infiltration rate varied greatly among different rock-soil interface shapes. (2) The main influencing factors of soil infiltration rate at rock-soil interface of different types of returning farmland were capillary porosity and non-capillary porosity. The initial infiltration rate

average infiltration rate and stable infiltration rate all had extremely significant negative correlation with capillary porosity (p＜0.01). The initial infiltration rate was significantly positively correlated with non-capillary porosity (p＜0.05). (3) Compared with Kostiakov model and Philip model

Horton model had the best applicability for fitting the soil infiltration process at the rock-soil interface of different types of returning farmland

and it could better simulate the soil infiltration process and predict the soil infiltration capacity. (4) According to the principal component analysis

soil infiltration capacity at the rock-soil interface followed the order of arable land (0.99)＞fallow field (0.16)＞returning farmland to shrubs and grassland (-0.43)＞returning farmland to orchard (-0.72). The returning farmland significantly reduced the soil infiltration capacity of the outcrop rock-soil interface in the rocky desertification area

especially at the convex rock-soil interface. The research results were expected to provide a scientific basis for future understanding of the water leakage at the rock-soil interface in rocky desertification areas after returning farmland.

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