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Background <p>The switch from chemical to organic fertilizers is an essential trend for modern sustainable agricultural practices. Nevertheless, there is a scarcity of data concerning the appropriate rate of organic fertilizer substitution, and the mechanisms through which bacterial sub-communities contribute to crop growth.</p> Methods <p>In this study, we investigated the effects of different ratios of organic fertilizer substitution on bacterial sub-communities and their role in cucumber growth. We classified the soil bacterial communities into generalists and specialists based on their niche breadth. High-throughput sequencing methods were used to analyze these bacterial sub-communities and their mechanisms of action.</p> Results <p>The results showed that organic fertilizer substitution decreased the α-diversity of specialists but increased the abundance of Proteobacteria and Actinobacteria. Specialists were more strongly correlated with environmental factors than generalists and had a higher abundance of functional genes. In addition, cucumber yield was more strongly correlated with functional genes related to nitrogen cycling and peaked at 75% organic fertilizer substitution.</p> Conclusion <p>Organic fertilizer substitution for chemical fertilizers has a greater impact on specialists and can improve cucumber yield and quality by affecting the structure and function of bacterial sub-communities. This research guides the scientific use of fertilizers to promote the increase of crop yield and support sustainable agriculture.&#xa0;</p>

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Organic fertilizer substitution for chemical fertilizer has a stronger effect on soil bacterial specialists than on generalists

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Ruoling Zhang,
  • Weidong Xu,
  • Hao Liu,
  • Xiang Long,
  • Jiaqing Zhou,
  • Min Xu,
  • Hui Cao,
  • Feng Wang

摘要

Background

The switch from chemical to organic fertilizers is an essential trend for modern sustainable agricultural practices. Nevertheless, there is a scarcity of data concerning the appropriate rate of organic fertilizer substitution, and the mechanisms through which bacterial sub-communities contribute to crop growth.

Methods

In this study, we investigated the effects of different ratios of organic fertilizer substitution on bacterial sub-communities and their role in cucumber growth. We classified the soil bacterial communities into generalists and specialists based on their niche breadth. High-throughput sequencing methods were used to analyze these bacterial sub-communities and their mechanisms of action.

Results

The results showed that organic fertilizer substitution decreased the α-diversity of specialists but increased the abundance of Proteobacteria and Actinobacteria. Specialists were more strongly correlated with environmental factors than generalists and had a higher abundance of functional genes. In addition, cucumber yield was more strongly correlated with functional genes related to nitrogen cycling and peaked at 75% organic fertilizer substitution.

Conclusion

Organic fertilizer substitution for chemical fertilizers has a greater impact on specialists and can improve cucumber yield and quality by affecting the structure and function of bacterial sub-communities. This research guides the scientific use of fertilizers to promote the increase of crop yield and support sustainable agriculture.