草地学报 ›› 2025, Vol. 33 ›› Issue (12): 3885-3897.DOI: 10.11733/j.issn.1007-0435.2025.12.003

• 研究论文 • 上一篇    

退化草地原位土壤接种丛枝菌根真菌对黄花苜蓿抗旱性的影响

蒙陈晨, 张克闽, 万吉鑫, 秘一先, 杨高文   

  1. 中国农业大学草业科学与技术学院, 北京 100193
  • 收稿日期:2025-01-02 修回日期:2025-03-18 发布日期:2025-12-01
  • 通讯作者: 杨高文,E-mail:yanggw@cau.edu.cn
  • 作者简介:蒙陈晨(2000-),女,水族,贵州贵阳人,硕士研究生,主要从事草地管理与牧草生产方向研究,E-mail:1445162523@qq.com;张克闽(2000-),男,汉族,安徽六安人,硕士研究生,主要从事草地管理与牧草生产研究,E-mail:1775656806@163.com;
  • 基金资助:
    内蒙古自治区科技计划项目(2022YFDZ0101)和自然科学基金(32271771)资助

Effects of Arbuscular Mycorrhizal Fungal Inoculation on the Drought Resistance of Medicago falcata in Situ Soil

MENG Chen-chen, ZHANG Ke-min, WAN Ji-xin, BI Yi-xian, YANG Gao-wen   

  1. College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2025-01-02 Revised:2025-03-18 Published:2025-12-01

摘要: 全球草原退化形势严峻,补播豆科牧草是重要恢复手段,但其苗期建植常受干旱胁迫制约。本研究旨在探究丛枝菌根真菌(Arbuscular mycorrhizal fungi, AMF)接种对补播豆科牧草黄花苜蓿(Medicago falcata)抗旱能力的调控机制。采用退化草甸的原位土壤进行黄花苜蓿盆栽试验,设置接种幼套近明球囊霉(Claroideoglomus etunicatum)、摩西斗管囊霉(Funneliformis mosseae)、二者混合接种及不接种对照,试验在不同的干旱条件下进行,测定生长、根系形态及养分吸收。结果表明,在自然微生物群落存在的退化土壤中,两种AMF均能与黄花苜蓿形成良好的共生关系。干旱胁迫下,AMF接种使根长、根表面积增加156.71%~423.92%,植株氮、磷含量最高提升达769.03%和1120.50%,并通过协同增强根系构型与养分活化,显著提高植株抗旱性及干旱后恢复力。此外,幼套近明球囊霉更具干旱适应性,且混合接种无协同效应,表明退化草地修复可选择适应性强的单一AMF菌株。

关键词: 丛枝菌根真菌, 黄花苜蓿, 干旱胁迫, 养分吸收

Abstract: The global grassland degradation situation is severe, and replanting legumes is an important means of restoration, but drought at seedling stage is the main constraint for replanting legumes. This study aimed?? to investigate the regulatory mechanism of arbuscular mycorrhizal fungi (AMF) inoculation on the drought tolerance of Medicago falcata. In situ soil from degraded meadows was used for pot experiments of M. falcata. The experiments were set up with inoculation with Claroideoglomus etunicatumFunneliformis mosseae, a mixture of the two, and a control without inoculation. The experiments were conducted under different drought conditions, and growth, root morphology, and nutrient absorption were measured. The results showed that both AMF species successfully colonized the roots of M. falcata in degraded meadow soils with natural microbial communities. Under drought treatment, AMF inoculation increased root length and root surface area by 156.71%-423.92%, and nitrogen and phosphorus contents of plants increased by 769.03% and 1120.50%, respectively. In addition, C. etunicatum showed stronger drought adaptability, and mixed inoculation had no synergistic effect, indicating that a single strain with strong adaptability could be selected for the restoration of degraded grassland.

Key words: Arbuscular mycorrhizal fungi, Medicago falcata, Drought stress, Nutrient uptake

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