Abstract:
Engineering disturbances accelerate the degradation of alpine meadows, and restoring degraded areas through ecological remediation helps maintain regional ecosystem stability. This study investigates changes in soil nutrients and microbial community characteristics over three years of ecological restoration, using soil from the ecological reconstruction of roadside slopes in the Wangbuqu Meadow as the research subject. Results indicate that post-restoration soil organic carbon, total nitrogen, ammonium nitrogen, and available potassium content significantly increased by 344.6%, 95.8%, 139.9%, and 174.1%, respectively. Microbial community diversity progressively enhanced, with rising temporal trends in the abundance of Acidobacteria, Chlorobacillus, Bacteroides, and Bacillus. Concurrently, soil urease, protease, and sucrase activities markedly intensified. Principal least squares-partial maximum projection (PLS-PM) analysis revealed that remediation duration served as the primary driver for soil organic carbon and nutrient recovery, facilitating synergistic restoration of soil and microbial communities by influencing microbial community structure and soil enzyme activity. This study provides empirical support for soil recovery outcomes in disturbed alpine meadow ecosystems.
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