植物生态学报 ›› 2026, Vol. 50 ›› Issue (3): 774-788.DOI: 10.17521/cjpe.2025.0388  cstr: 32100.14.cjpe.2025.0388

• 研究论文 • 上一篇    

丛枝菌根真菌与不同功能细菌联用对苜蓿的促生作用

姜庆宏1, 丁露1, 王哲1, 郑春丽2,*(), 冯昭绰1   

  1. 1 内蒙古科技大学能源与环境学院, 内蒙古包头 014010
    2 上海第二工业大学资源与环境工程学院, 上海 201209
  • 收稿日期:2025-10-27 接受日期:2026-03-11 出版日期:2026-03-20 发布日期:2026-04-22
  • 通讯作者: *郑春丽(zhengchunli1979@163.com)
  • 基金资助:
    内蒙古自然科学基金(2023MS04010);内蒙古自治区直属高校基本科研业务费专项资金(2024XKJX016);内蒙古自治区直属高校基本科研业务费专项资金(2023CXPT004);国家自然科学基金(52264013)

Growth-promoting effects of arbuscular mycorrhizal fungi combined with different functional bacteria on Medicago sativa

JIANG Qing-Hong1, DING Lu1, WANG Zhe1, ZHENG Chun-Li2,*(), FENG Zhao-Chuo1   

  1. 1 School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Nei Mongol 014010, China
    2 School of Resource and Environmental Engineering, Shanghai Polytechnic University, Shanghai 201209, China
  • Received:2025-10-27 Accepted:2026-03-11 Online:2026-03-20 Published:2026-04-22
  • Contact: *ZHENG Chun-Li(zhengchunli1979@163.com)
  • Supported by:
    Nei Mongol Natural Science Foundation(2023MS04010);Fundamental Research Funds for the Universities of Nei Mongol Autonomous Region(2024XKJX016);Fundamental Research Funds for the Universities of Nei Mongol Autonomous Region(2023CXPT004);National Natural Science Foundation of China(52264013)

摘要:

鄂尔多斯半干旱煤矿区长期以来面临着土壤养分贫瘠、植株定植困难等问题。微生物与植物是生态系统中紧密关联的两大类群, 丛枝菌根真菌(AMF)可与植物互惠共生, 促进土壤生态系统间的养分循环, 但是关于AMF联合不同功能细菌对土壤和草本植物的影响还鲜有研究。该研究将AMF与3种功能细菌多元组合对苜蓿(Medicago sativa)根系进行侵染, 探究了其对鄂尔多斯煤矿区半干旱土壤理化性质的改良以及对该地区植株的促生效应。结果表明, 与只种植苜蓿(CK2)相比, AMF+根瘤菌+巨大芽孢杆菌(ARB)体系使得苜蓿根系土壤中的养分水平显著提升, 土壤有机质、全氮、速效磷含量分别提高了93.7%、117.6%、215.6%。此外, 还提高了植物的抗逆性, 促进了植物的生长, 苜蓿根系的AMF侵染率提高了76.9%, 增加了53.2条一级新根, 侧根长增加8 cm, 地上生物量提升了168.0%。高通量测序结果显示, ARB组中鞘氨醇单胞菌属(Sphingomonas)、节杆菌属(Arthrobacter)等菌属的相对丰度上升, 成为优势菌属。综上所述, 在ARB微生物体系下真菌与细菌的联合作用对土壤理化性质的改善及苜蓿的促生效果较好, 研究为解决半干旱矿区土壤贫瘠、植物定植困难等问题提供了科学参考。

关键词: 丛枝菌根真菌, 细菌真菌联用, 植物生长促进, 土壤微生物修复, 苜蓿

Abstract:

Aims The semi-arid coal mining area of Ordos has long faced challenges such as poor soil fertility and difficulties in plant establishment. Microorganisms and plants are closely interconnected components of ecosystems. Arbuscular mycorrhizal fungi (AMF) can form mutualistic symbioses with plants and promote nutrient cycling within soil ecosystems. However, studies investigating the combined effects of AMF and different functional bacteria on soil properties and herbaceous plant growth remain limited. In this study, arbuscular mycorrhizal fungi were combined with three functional bacteria in various inoculation treatments and applied to the roots of alfalfa (Medicago sativa). The study evaluated their effects on improving the physicochemical properties of semi-arid soils in the Ordos coal mining area and their growth-promoting effects on plants.

Methods In this study, we combine arbuscular mycorrhizal fungi with three functional bacteria in multiple combinations to inoculate the alfalfa roots, investigate their improvement effects on the physicochemical properties of semi-arid soils in Ordos coal mining area and the growth-promoting effects on plants in the region.

Important findings Our results reveal that, compared with only growing alfalfa, the AMF + Rhizobium + Bacillus megaterium (ARB) system significantly enhanced the nutrient levels in the soil of alfalfa roots. Contents of soil organic matter, total nitrogen, and available phosphorous increased by 93.7%, 117.6% and 215.6%, respectively. This treatment also enhanced the stress resistance of plants and promotes its growth. The AMF infection rate in alfalfa roots increased by 76.9%, the primary roots increased by 53.2, the lateral root length increased by 8 cm, and the aboveground biomass of alfalfa increased by 168.0%. High-throughput sequencing results showed that in the ARB treatment, the relative abundances of the genera such as Sphingomonas, and Arthrobacterincreased, becoming dominant genera. These findings provide a scientific basis for addressing soil infertility and difficulties in plant establishment challenges in semi-arid mining areas.

Key words: arbuscular mycorrhizal fungi, bacterial-fungal combination, plant growth promotion, soil microbial remediation, Medicago sativa