草地学报 ›› 2025, Vol. 33 ›› Issue (6): 1912-1923.DOI: 10.11733/j.issn.1007-0435.2025.06.023

• 研究论文 • 上一篇    

高寒灌丛化草地灌木去除管理措施对土壤水源涵养功能的影响

张怡1, 胡健1,2, 周青平1,2, 王弘宇1, 陈江枚1, 王三欣1, 王嘉琪1, 马文婷1, 孙欢1   

  1. 1. 西南民族大学草地资源学院, 四川 成都 610041;
    2. 西南民族大学四川若尔盖高寒湿地生态系统国家野外科学观测研究站, 四川 成都 610041
  • 收稿日期:2025-01-24 修回日期:2025-03-03 发布日期:2025-06-13
  • 通讯作者: 胡健,E-mail:jianhu@swun.edu.cn
  • 作者简介:张怡(2000-),女,汉族,四川内江人,硕士研究生,主要从事草地生态水文研究,E-mail:220909002001@stu.swun.edu.cn
  • 基金资助:
    国家自然科学基金项目(42007057);四川省自然科学基金项目(2024NSFSC0106);西南民族大学中央高校基本科研业务费专项资金(ZYN2025086)资助

Effects of Shrub Removal Management Measures on Soil Water Conservation Function in Alpine Shrub-encroached Grassland

ZHANG Yi1, HU Jian1,2, ZHOU Qing-ping1,2, WANG Hong-yu1, CHEN Jiang-mei1, WANG San-xin1, WANG Jia-qi1, MA Wen-ting1, SUN Huan1   

  1. 1. College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan Province 610041, China;
    2. Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Southwest Minzu University, Chengdu, Sichuan Province 610041, China
  • Received:2025-01-24 Revised:2025-03-03 Published:2025-06-13

摘要: 在暖湿化背景下,青藏高原存在明显的灌木扩张趋势,直接影响其水源涵养功能,但是高寒草地灌木去除管理措施对土壤水分入渗、流失及其水源涵养能力的影响尚不清楚。因此,本研究评估了青藏高原东缘典型自然草地、自然灌丛化草地、去除灌木冠层和根草地、去除灌木冠层草地之间的水源涵养能力差异。结果表明:4种处理方式在10~20 cm土层的土壤含水量最高,而其最大入渗量、流失量多集中在0~10 cm土层;灌丛化草地在整个土壤剖面中具有较高的土壤含水量,与自然草地相比,灌丛化草地增强了土壤水分的入渗量,并在一定程度上提升了水源涵养能力;降雨量显著影响自然草地水源涵养能力,除了去除灌木冠层草地在去除初期外,2种去除方式也都具有较强的水源涵养能力,而去除灌木冠层和根比仅去除灌木冠层处理的水源涵养能力更稳定。总的来说,这些结果可为高寒草地的可持续利用与管理提供理论支撑。

关键词: 高寒草地, 草地灌丛化, 土壤水分, 水源涵养功能

Abstract: The Qinghai-Tibet Plateau shows an obvious tendency for shrub expansion under the warm-wet tendency, which directly impacts its water conservation function. However, the differences in soil water infiltration, loss, and water conservation capacity caused by the shrub removal management measures in alpine shrub-encroached grassland are still unclear. In this study we assessed differences in water conservation capacity among typical natural grassland, shrub-encroached grassland, shrub canopy and root removal grassland, and shrub canopy removal grassland on the Qinghai-Tibet Plateau. The results showed that the four treatments had the highest soil moisture in the 10-20 cm soil layer, while their maximum infiltration and loss were mostly concentrated in the 0-10 cm soil layer. Shrub-encroached grassland had higher soil moisture across the entire soil profile, and compared to the natural grassland, the shrub-encroached grassland enhanced soil water infiltration and improved water conservation capacity to a certain extent. In addition, rainfall significantly affected the water conservation capacity of natural grasslands, and both removal methods demonstrated strong water conservation capacity except for shrub canopy removal grassland in the initial period. In contrast, shrub canopy and root removal demonstrated a more stable water conservation capacity than the shrub canopy only treatment. Overall, these results can provide theoretical support for the sustainable utilization and management of alpine grasslands.

Key words: Alpine meadow, Shrub encroachment, Soil moisture, Water conservation function

中图分类号: