Natural succession and afforestation are the two main restoration methods of degraded soil in semiarid and arid regions. Up to now, the soil microbial communities and their roles in soil erodibility have been unclear. Our work aimed to evaluate the effects of ecological restoration on the diversity and composition of soil microbial communities at depths of 0–20 cm and their interaction with soil erodibility. Four main restoration types, natural succession land and Pinus tabuliformis, Armeniaca sibirica, and Robinia pseudoacacia plantations were chosen. Restoration with different vegetation communities decreased the soil erodibility K-factor (K) by 13.37–20.64%. Proteobacteria, Acidobacteria, and Actinobacteria were dominant bacterial phyla at all sites. The dominant fungal phyla were Basidiomycota, Ascomycota, and Zygomycota. However, there were obvious differences in bacterial and fungal communities among restoration types due to variations in plant and soil properties. Redundancy analysis showed that the soil microbial communities explained 67.30% of the total variance in soil erodibility. Bacterial communities mainly affect the microaggregate formation, whereas fungal communities have a greater effect on macroaggregate formation. Additionally, the structural equation modeling also suggests that vegetation characteristics, soil organic carbon, and fungal communities, and macroaggregates (> 5 mm) have positive effects on mean weight diameter. Therefore, the combination of vegetation community, soil properties, and microbial communities improves the soil structure against erosion in this area.

中文翻译：

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土壤微生物群落对土壤可蚀性的响应取决于半干旱地区的植物和土壤特性

自然演替和植树造林是半干旱和干旱地区退化土壤的两种主要恢复方式。迄今为止，土壤微生物群落及其在土壤可蚀性中的作用尚不清楚。我们的工作旨在评估生态恢复对 0-20 cm 深度土壤微生物群落多样性和组成的影响及其与土壤可蚀性的相互作用。选择了四种主要的恢复类型，自然演替地和油松、西伯利亚和刺槐人工林。不同植被群落的恢复降低了土壤可蚀性K因子（K) 13.37–20.64%。Proteobacteria、Acidobacteria 和 Actinobacteria 是所有位点的优势细菌门。主要的真菌门是担子菌门、子囊菌门和接合菌门。然而，由于植物和土壤性质的变化，不同恢复类型的细菌和真菌群落存在明显差异。冗余分析表明，土壤微生物群落解释了土壤可蚀性总变异的 67.30%。细菌群落主要影响微团聚体的形成，而真菌群落对大团聚体的形成影响更大。此外，结构方程模型还表明植被特征、土壤有机碳和真菌群落以及大团聚体（> 5 毫米）对平均重量直径有积极影响。所以，