草地学报 ›› 2025, Vol. 33 ›› Issue (12): 3958-3968.DOI: 10.11733/j.issn.1007-0435.2025.12.009

• 研究论文 • 上一篇    

不同修复方式对退化高寒草地植被及土壤真菌群落特征的影响

宋学澳1, 李世雄1,2,3, 赵文1, 刘晶晶1, 王彦龙1,2,3, 徐海峰1, 尹亚丽1,2   

  1. 1. 青海大学畜牧兽医科学院, 青海 西宁 810016;
    2. 青海省高寒草地适应性管理重点实验室/青海大学, 青海 西宁 810016;
    3. 三江源区高寒草地生态教育部重点实验室/青海大学, 青海 西宁 810016
  • 收稿日期:2025-01-13 修回日期:2025-03-01 发布日期:2025-12-01
  • 通讯作者: 尹亚丽,E-mail:yaliyin@163.com
  • 作者简介:宋学澳(1999-),男,汉族,甘肃会宁人,硕士研究生,主要从事牧草真菌病害和草地生态与环境保护研究,E-mail:1638300438@qq.com;
  • 基金资助:
    青海省科技项目(2023-ZJ-925M);国家自然科学基金项目(32260357) 资助

The Impacts of Different Restoration Approaches on the Vegetation and Soil Fungal Community Characteristics in Degraded Alpine Grasslands

SONG Xue-ao1, LI Shi-xiong1,2,3, ZHAO Wen1, LIU Jing-jing1, WANG Yan-long1,2,3, XU Hai-feng1, YIN Ya-li1,2   

  1. 1. Academy of Animal and Veterinary Science, Qinghai University Academy of Animal and Veterinary Science, Xining, Qinghai Province 810016, China;
    2. Qinghai Provincial Key Laboratory of Adaptive Management on Alpine Grassland, Qinghai University, Xining, Qinghai Province 810016, China;
    3. Key Laboratory of Alpine Grassland Ecosystem in the Three-River-Source, Ministry of Education, Qinghai University, Xining, Qinghai Province 810016, China
  • Received:2025-01-13 Revised:2025-03-01 Published:2025-12-01

摘要: 为探究不同修复方式对退化高寒草地的影响,本研究以祁连山中度退化草地(CK)为对照,设置春季休牧(T1)和春季休牧+免耕补播(T2)两种修复方式,分析植被与土壤真菌群落变化。结果表明:两种修复方式均显著降低杂类草重要值,提高了禾本科和莎草科重要值且植被地上生物量在T1和T2处理下分别增加64.34%和480.28%,且T2显著高于T1。修复措施显著提升了物种丰富度、多样性和均匀度指数,降低了优势度指数。土壤真菌群落以子囊菌门、被孢霉菌门和担子菌门为主,在T2处理中子囊菌门丰度显著提高并降低被孢霉菌门丰度。NMDS分析显示不同修复措施改变真菌群落结构,T2处理使Chao1和ACE指数显著降低。冗余分析表明,植被生物量和土壤有机碳是驱动真菌群落变化的关键环境因子。综合表明,免耕补播结合春季休牧对退化草地的修复效果最优,能同步改善植被和土壤微生物群落结构。

关键词: 高寒草地, 中度退化, 春季休牧, 免耕补播, 土壤真菌群落

Abstract: To investigate the effects of different restoration approaches on degraded alpine grasslands, this study used moderately degraded grassland (CK) in the Qilian Mountains as the control and compared two restoration methods: spring grazing exclusion (T1) and spring grazing exclusion combined with no-till reseeding (T2). The vegetation and soil fungal community dynamics were analyzed. The results showed that both restoration methods significantly reduced the importance value of forbs while increasing those of grasses (Poaceae) and sedges (Cyperaceae). Aboveground vegetation biomass increased by 64.34% and 480.28% under T1 and T2 treatments, respectively, with T2 being significantly higher than T1.The restoration measures notably enhanced species richness, diversity, and evenness indices while reducing dominance indices. The soil fungal community was dominated by Ascomycota, Mortierellomycota, and Basidiomycota, with T2 significantly increasing Ascomycota abundance and decreasing Mortierellomycota abundance. NMDS analysis revealed that different restoration methods altered fungal community structure, with T2 significantly reducing Chao1 and ACE indices. Redundancy analysis indicated that vegetation biomass and soil organic carbon were key environmental factors driving fungal community changes. Overall, the combination of no-till reseeding and spring grazing exclusion proved to be optimal for restoring degraded grasslands, simultaneously improving vegetation and soil microbial community structure.

Key words: Alpine grassland, Moderate degradation, Spring rest grazing, No-till overseeding, Soil fungal community

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