草地学报 ›› 2025, Vol. 33 ›› Issue (8): 2652-2665.DOI: 10.11733/j.issn.1007-0435.2025.08.025

• 研究论文 • 上一篇    下一篇

黄河源高寒草甸鼠丘斑块土壤特性对植被多样性的影响

姜成栋1, 李国荣1,2, 童生春1, 李进芳1, 朱海丽1,2, 刘亚斌1,2, 陈文婷1,2, 胡夏嵩1   

  1. 1. 青海大学 地质工程学院, 青海 西宁 810016;
    2. 青藏高原北缘新生代资源环境重点实验室, 青海 西宁 810016
  • 收稿日期:2024-10-21 修回日期:2024-12-11 出版日期:2025-08-15 发布日期:2025-08-27
  • 通讯作者: 李国荣, E-mail:qdliguorong@163.com
  • 作者简介:姜成栋(2000-),男,汉族,青海西宁人,硕士研究生,主要从事地质灾害及其防治研究,E-mail:13897254927@163.com
  • 基金资助:
    青海大学研究生科研和实践创新项目(2025-GPKY-12);国家自然科学基金“冻融作用下高寒草甸表层裂缝形成力学机制及根系阻裂增韧效应”(42062019)资助

Effects of Soil Characteristics on Vegetation Diversity in Alpine Meadow Rat Mound Patchs in the Yellow River Source

JIANG Cheng-dong1, LI Guo-rong1,2, TONG Sheng-chun1, LI Jin-fang1, ZHU Hai-li1,2, LIU Ya-bin1,2, CHEN Weng-ting1,2, HU Xia-song1   

  1. 1. School of Geological Engineering, Qinghai University, Xining, Qinghai Province 810016, China;
    2. Key Laboratory of Cenozoic Resources and Environment of the Northern Margin of the Qinghai-TibetPlateau, Xining, Qinghai Province 810016, China
  • Received:2024-10-21 Revised:2024-12-11 Online:2025-08-15 Published:2025-08-27

摘要: 本研究以青海河南县高原鼠兔与鼢鼠鼠丘斑块为对象,采用样方法调查不同恢复阶段鼠丘斑块的植物组成、多样性及根系特征,建立土壤物理力学特性与植被盖度和根系特征间的内在关联性,揭示鼠丘斑块土壤物理力学特性对植被多样性和植物根系的影响,为优化高寒草甸退化斑块的植被修复技术提供理论依据。结果表明:2类鼠丘斑块的物种组成和群落特征差异显著,其表面α多样性指数均随植被恢复而上升,覆盖度大于50%后植被多样性处于显著增长阶段(P<0.05),且土壤物理力学特性得到明显改良。主成分分析显示鼠丘斑块土壤性质差异主要取决于植被覆盖度、土壤容重和总孔隙度。混合效应模型证实根系对多样性贡献最大,结构方程模型证实鼠丘土壤物理力学特性对多样性及根系特征产生直接影响。自然恢复与人工干预相结合实施鼠丘斑块植被恢复是最佳模式。

关键词: 黄河源, 高寒草甸, 鼠丘斑块, 植被多样性, 土壤物理力学特性

Abstract: In this study, the plant composition, diversity and root characteristics of rat mounds in plateau pikas and mole moles in Henan County, Qinghai Province were investigated by sample method at different restoration stages and the internal correlation between soil physical and mechanical properties and vegetation coverage and root characteristics was established to reveal the effects of soil physical and mechanical properties of rat mound patchs on vegetation diversity and plant roots. So as to provide a theoretical basis for optimizing the vegetation restoration technology of degraded patches in alpine meadows. The results showed that there were significant differences in species composition and community characteristics between the two types of rat mound patches, and their surface α diversity index increased with vegetation restoration. The vegetation diversity was in a significant growth stage after the coverage was greater than 50% (P<0.05), and the physical and mechanical properties of the soil were significantly improved. Principal component analysis (PCA) showed that the differences in soil properties in rat mound patches mainly depended on vegetation coverage, soil bulk density and total porosity. The mixed-effect model confirmed that the root system contributed the most to the diversity, and the structural equation model confirmed that the physical and mechanical properties of the rat mound soil had a direct impact on the diversity and root characteristics. The combination of natural restoration and manual intervention to implement the revegetation of rat mound patches is the best model.

Key words: Source of the Yellow River, Alpine meadows, Rat mound plaques, Vegetation diversity, Soil physical and mechanical properties

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