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Purpose <p>The rhizosphere microbial community is crucial for plant health and soil biochemical processes. Application of plant growth-promoting rhizobacteria (PGPR) or biochar is shown to improve plant growth and soil fertility, however, their impact, particularly when applied in combinations, on plant growth and rhizosphere microbial community remains poorly investigated.</p> Methods <p>In a pot experiment, we tested the effect of separate or combined applications of <i>Bacillus</i> sp. P1 (an efficient PGPR strain) and biochar (1.5% w/w) on tomato rhizosphere bacterial community using a high-throughput sequencing technique, and studied the changes in seedlings biomass and selected soil chemical properties.</p> Results <p>As compared to the control, all treatments increased tomato seedling biomass with the combination treatment being the most effective. However, bacterial diversity was higher only in sole PGPR treatment. The two application methods also differentially affected the soil bacterial community composition and community structure. Moreover, the application of biochar alone or with PGPR increased soil pH and C/N ratio as compared to control.</p> Conclusions <p>While the application of PGPR has profound effects on the tomato rhizosphere bacterial community, its combination with biochar performed better in improving seedling biomass and soil chemistry. Therefore, PGPR application in combination with biochar could be a promising strategy for improving crop plant growth and soil health sustainably.</p>

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Biochar and PGPR Influence Rhizosphere Bacteria and Synergistically Regulate Tomato Seedling Biomass Under Greenhouse Conditions

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Zhenlu Yan,
  • Yuyuan Xing,
  • Changli Ma,
  • Xin Li,
  • Yaping Duan,
  • Xue Wang,
  • Minghao Liu,
  • Muhammad Khashi u Rahman,
  • Xingang Zhou

摘要

Purpose

The rhizosphere microbial community is crucial for plant health and soil biochemical processes. Application of plant growth-promoting rhizobacteria (PGPR) or biochar is shown to improve plant growth and soil fertility, however, their impact, particularly when applied in combinations, on plant growth and rhizosphere microbial community remains poorly investigated.

Methods

In a pot experiment, we tested the effect of separate or combined applications of Bacillus sp. P1 (an efficient PGPR strain) and biochar (1.5% w/w) on tomato rhizosphere bacterial community using a high-throughput sequencing technique, and studied the changes in seedlings biomass and selected soil chemical properties.

Results

As compared to the control, all treatments increased tomato seedling biomass with the combination treatment being the most effective. However, bacterial diversity was higher only in sole PGPR treatment. The two application methods also differentially affected the soil bacterial community composition and community structure. Moreover, the application of biochar alone or with PGPR increased soil pH and C/N ratio as compared to control.

Conclusions

While the application of PGPR has profound effects on the tomato rhizosphere bacterial community, its combination with biochar performed better in improving seedling biomass and soil chemistry. Therefore, PGPR application in combination with biochar could be a promising strategy for improving crop plant growth and soil health sustainably.