不同功能菌与高羊茅互作对贫瘠土壤微生物多样性与土壤结构及理化性质的影响

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中图分类号：S154.34 文献标识号：A 文章编号：1001-4942（2025）09-0138-11

Effects of Different Functional Microbes Interacting with Tall Fescue on Microbial Diversity， Structure and Physicochemical Properties of Infertile Soil

Tao Yutong'，Hu Yunfei¹，Han Hongrui1，Li Yanyu¹，Bai Jinxin¹，Shi Lihao¹ Luo Zhengyu1.2，Yan Dong³，Sun Huazhang³

（1. School of Ecology and Environment， Chengdu University of Technology，Chengdu 610o59，China; 2. Key Laboratory of Synergistic Control and Joint Remediation of Soil and Water Pollution for National Environmental Protection， Chengdu 61oo59， China ; 3. Gyaca Hydropower Construction Branch，Huaneng Tibet Yarlung Zangbo River Hydropower Development & Investment Co.，Ltd.，Lhasa 850o00，China）

AbstractInfertile soil，due to insufficient nutrients and low water retention capacity，restricts plant growth and ecosystem health.Therefore，it is essential to seek efective strategies for soil amelioration.In this study，indoor pot experiment was conducted using tal fescue （Festuca arundinacea）as material，and using gravelly soil as the cultivation substrate.Four speciesof functional microbes，Bacillussubtilis，Bacillus amyloliquefaciens，Aspergillus niger，and Trichoderma harzianum，were selected and applied to the substrate to investigate the effcts of diffrent microbes-plant interactions on rhizosphere soil microbial diversity，structure， and physicochemical properties.The correlation analysis between rhizosphere soil physicochemical properties and soil enzyme activities was performed. The results showed that inoculation with exogenous functional microbes altered the soil microbial community composition compared to the uninoculated control.After 12O days， the treatments with B . amyloliquefaciens and T. harzianum increased soil water content by 14.52% and 15.38% ，respectively，compared with the initial soil； the macroaggregate rate rose to 83.38% and 85.22% ， indicating improved soil structural stability.The T. harzianum treatment significantly increased to contents of soil organic matter，available potassum，and available phosphorus.Correlation analysis revealed significant relationships between soil physicochemical properties and soil enzyme activities.These results could provide theoretical evidences for the remediation of infertile soils.

KeywordsInfertile soil; Functional microbes；Festuca arundinacea； Soil structure； Soil physicochemi-cal properties；Microbial community

贫瘠化土壤保水能力差，土质松散且养分含量低，严重制约植物的生长发育，对生态系统功能造成不良影响[1-2]。（剩余14008字）