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| Citation: | Luo Zhengyu, Pei Xiangjun, Han Hongrui, Xie Yongfang, Zou Tong, Yan Guoru, 2026. Plant-Microbe Interactions in Soil Stabilization and Erosion Control on TBM Muck Slopes in Alpine Regions. Earth Science, 51(9): 3320-3331. doi: 10.3799/dqkx.2026.123
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This study aims to evaluate the effects of plant-microbe combined remediation on soil stabilization and erosion resistance of TBM muck slopes on the Qinghai-Xizang Plateau, where slope materials are loose in structure, deficient in nutrients, and difficult to revegetate. Indoor pot experiments and field slope trials were conducted. A control (CK) and five microbial treatments were established, including Bacillus subtilis (K), Bacillus licheniformis (DY), Bacillus amyloliquefaciens (JD), Aspergillus niger (H), and Trichoderma harzianum (HC). Soil nutrients, enzyme activities, plant growth, and slope hydrodynamic parameters were measured. The results show that the plant-microbe combined treatments improved root development, enhanced enzyme activities, and ameliorated nutrient conditions, thereby exerting integrated effects on slope hydrodynamic characteristics and ultimately increasing slope erosion resistance. Runoff power was reduced by up to 97.36%, while the resistance coefficient increased by up to 486.26%. The findings provide an effective technical approach for the ecological restoration and soil and water conservation of TBM waste-muck slopes in alpine and high-altitude regions.
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