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<p>Organic fertilization is highly valuable in improving soil quality and functions, especially in nutrient-poor mine soils. Soil microbes are the major drivers of soil biogeochemical cycling and functions. The study aimed to explore the roles of different organic fertilization in regulating soil microbial community structure and functions in mine desert soils. In this study, a 90-day pot experiment was conducted under four typical fertilization managements: no fertilization (MK), biochar fertilizer (MS), peat (MC), and sheep manure (MY) with three application gradients (3%, 5%, and 7%). Our findings indicated that the application of organic fertilization significantly enhanced soil available nutrients, but did not affect microbial community diversity. In addition, organic fertilization significantly increased the relative abundance of <i>Proteobacteria</i> and decreased the relative abundance of <i>Actinobacteriota</i>, <i>Chloroflexi</i>, and <i>Firmicutes</i>, indicating that the addition of organic fertilizer has altered the mine desert soil microbial community structure. Among all three organic fertilizations, peat works best in enhancing soil available nutrient and improving microbial community structure. The functional prediction suggests that organic fertilization altered the functional group structure of bacteria present in mine desert soils. Redundancy analysis showed that alkali-hydrolyzed N and available P were the crucial factors in determining microbial community structure. Overall, our findings indicate that the applications of organic fertilization can improve soil quality and microbial functions in nutrient-poor mine soils while maintaining the positive impacts of organic fertilization on soil microbial community structure.</p>

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Organic fertilization enhances soil bacterial community function, but has minor effects on bacterial community diversity in mine desert soils

  • 期刊论文

  • 发表日期：

    2025年8月2日

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  • Ling Li,
  • Yang Chen,
  • Changde Yang,
  • Fei Chen,
  • Li Chen,
  • Yang Hu,
  • Chunxiao Wu,
  • Xingyun Huang

摘要

Organic fertilization is highly valuable in improving soil quality and functions, especially in nutrient-poor mine soils. Soil microbes are the major drivers of soil biogeochemical cycling and functions. The study aimed to explore the roles of different organic fertilization in regulating soil microbial community structure and functions in mine desert soils. In this study, a 90-day pot experiment was conducted under four typical fertilization managements: no fertilization (MK), biochar fertilizer (MS), peat (MC), and sheep manure (MY) with three application gradients (3%, 5%, and 7%). Our findings indicated that the application of organic fertilization significantly enhanced soil available nutrients, but did not affect microbial community diversity. In addition, organic fertilization significantly increased the relative abundance of Proteobacteria and decreased the relative abundance of Actinobacteriota, Chloroflexi, and Firmicutes, indicating that the addition of organic fertilizer has altered the mine desert soil microbial community structure. Among all three organic fertilizations, peat works best in enhancing soil available nutrient and improving microbial community structure. The functional prediction suggests that organic fertilization altered the functional group structure of bacteria present in mine desert soils. Redundancy analysis showed that alkali-hydrolyzed N and available P were the crucial factors in determining microbial community structure. Overall, our findings indicate that the applications of organic fertilization can improve soil quality and microbial functions in nutrient-poor mine soils while maintaining the positive impacts of organic fertilization on soil microbial community structure.