放牧对希拉穆仁草原土壤入渗过程影响的定量评估

耿林昇; 李红丽; 董智; 郭建英; 陈新闯

doi:10.13870/j.cnki.stbcxb.2022.02.009

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放牧对希拉穆仁草原土壤入渗过程影响的定量评估

更新时间：2024-11-07

- 放牧对希拉穆仁草原土壤入渗过程影响的定量评估
- Quantitative Evaluation of the Effects of Grazing on Soil Infiltration Process in Xilamuren Grassland
- 水土保持学报 2022年36卷第2期页码：70-77
- 作者机构：
  
  1. 山东农业大学林学院, 泰山森林生态系统定位研究站,山东,泰安,271018
  2. 水利部牧区水利科学研究所,呼和浩特,010020
- 作者简介：
  
  [ "耿林昇(1996-),男,在读硕士研究生,主要从事水土流失过程与机制研究。E-mail:stbcgls@163.com" ]
- 基金信息：
  
  国家自然科学基金项目（51879155,31870708）
- DOI：10.13870/j.cnki.stbcxb.2022.02.009
  中图分类号： S152.7
- 纸质出版：2022
- 稿件说明：
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耿林昇, 李红丽, 董智, 等. 放牧对希拉穆仁草原土壤入渗过程影响的定量评估[J]. 水土保持学报, 2022,36(2):70-77.

GENG Linsheng, LI Hongli, DONG Zhi, et al. Quantitative Evaluation of the Effects of Grazing on Soil Infiltration Process in Xilamuren Grassland[J]. 2022, 36(2): 70-77.
耿林昇, 李红丽, 董智, 等. 放牧对希拉穆仁草原土壤入渗过程影响的定量评估[J]. 水土保持学报, 2022,36(2):70-77. DOI： 10.13870/j.cnki.stbcxb.2022.02.009.

GENG Linsheng, LI Hongli, DONG Zhi, et al. Quantitative Evaluation of the Effects of Grazing on Soil Infiltration Process in Xilamuren Grassland[J]. 2022, 36(2): 70-77. DOI： 10.13870/j.cnki.stbcxb.2022.02.009.

摘要

为定量评估放牧对草原土壤入渗的影响

了解和防治放牧造成的水土流失

科学评估草原水文调节功能

采用双环入渗法研究了放牧对典型草原土壤入渗性能的影响

并收集影响土壤入渗的环境特征变量。结果表明:(1)土壤入渗能力均受到放牧活动的干扰

随着放牧强度的增加

土壤初渗速率、稳渗速率减小

达到稳渗时的历时缩短

而轻度放牧对土壤入渗性能却具有增强作用

LG的初渗速率(5.12 mm/min)、稳渗速率(1.93 mm/min)、2 h累积入渗量(213.42 mm)均较好

快速入渗至稳渗阶段历时延长。(2)不同放牧强度下

放牧强度与土壤初渗速率、稳渗速率、累积入渗量呈显著负相关关系

Abstract

In order to quantitatively evaluate the impact of grazing on the process of grassland soil infiltration

understand and prevent soil erosion by grazing and scientifically evaluate the hydrological regulation function of grassland

this study took Xilamuren grassland as the main research object and used the double-loop infiltration method to study the effects of grazing on soil infiltration performance of typical grassland and collected the environmental characteristic variables affecting soil infiltration. The results showed that:(1) The soil infiltration capacity was disturbed by grazing activities. With the increasing of grazing intensity

the initial soil infiltration rate and steady infiltration rate decreased

and the time to reach steady infiltration shortened. However

light grazing (LG) enhanced the infiltration performance of the soil. The initial infiltration rate (5.12 mm/min)

steady infiltration rate (1.93 mm/min) and cumulative infiltration capacity (213.42 mm) for 2 hours were all good under the LG condition. The duration from the rapid infiltration stage to the stable infiltration stage of LG was prolonged. (2) Under different grazing intensities

there was a significant negative correlation between grazing intensity and soil initial infiltration rate

steady infiltration rate and cumulative infiltration amount

and the correlation coefficients were -0.646

-0.770 and -0.531

respectively. Vegetation coverage

sand volume percentage and porosity were all positively related to soil infiltration rate

while soil bulk density was the opposite. Soil bulk density

total porosity and capillary porosity had the most significant effect on soil infiltration rate. Appropriate grazing (LG

1.5 sheep/(hm2·month)) improved soil characteristic parameters and vegetation growth

and increased soil infiltration performance. (3) Through the analysis of soil infiltration model

the Horton model had the best fitting effect on soil infiltration rate and soil cumulative infiltration. This study could provide a reference for the quantitative evaluation of soil infiltration and hydrological regulation function of typical grassland under grazing conditions.

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