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Background and aims <p>Waste stone powder (WSP), a by-product of stone processing, are usually indiscriminately stacked on the land and causes severe environmental pollution. This study aimed to enhance chili growth by improving WSP using synthetic microalgae community (SynMiCom).</p> Methods <p>A SynMiCom consisting of three microalgae <i>Anabaena azotica</i>, <i>Chlorella pyrenoidosa</i> and <i>Scenedesmus</i> sp. was prepared and its plant growth-promoting effects on chili (<i>Capsicum annuum</i> L.) in unweathered and weathered WSP were evaluated.</p> Results <p>The results showed that the SynMiCom increased plant height, stem diameter, root length, and lateral root number of chili planted in the weathered WSP by 44.72%, 29.25%, 54.82%, and 134.61%, respectively. Moreover, the SynMiCom promoted the fragmentation of the weathered WSP and significantly increased the activities of urease and invertase by 11.98% and 33.58%, and the contents of available nitrogen and available phosphorus by 71.64% and 50.15%, respectively. Furthermore, the SynMiCom significantly enriched endophytic beneficial bacteria (<i>Rhizobiaceae</i> and <i>Sphingomonadaceae</i>) and fungi (<i>GS13</i>_fam_Incertae_sedis), which showed positive correlations with chili growth and WSP physicochemical parameters.</p> Conclusion <p>The SynMiCom reshaped microbial network structure, promoted the cycling of N and P elements in the WSP, and thereby effectively promoted chili growth. These findings provided insights into the application of the SynMiCom in the resource utilization of WSP for the cultivation of economic crops.</p>

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Synthetic microalgae community promotes chili growth planted in waste stone powder by enriching beneficial root endophytic bacteria and fungi

  • 期刊论文

  • 发表日期：

    2025年11月4日

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  • Cong Liu,
  • Hongqing Wei,
  • Shaoguo Ru,
  • Weizhong Wang,
  • Zhengmao Li,
  • Lijuan Liu,
  • Xiukai Song,
  • Jun Wang

摘要

Background and aims

Waste stone powder (WSP), a by-product of stone processing, are usually indiscriminately stacked on the land and causes severe environmental pollution. This study aimed to enhance chili growth by improving WSP using synthetic microalgae community (SynMiCom).

Methods

A SynMiCom consisting of three microalgae Anabaena azotica, Chlorella pyrenoidosa and Scenedesmus sp. was prepared and its plant growth-promoting effects on chili (Capsicum annuum L.) in unweathered and weathered WSP were evaluated.

Results

The results showed that the SynMiCom increased plant height, stem diameter, root length, and lateral root number of chili planted in the weathered WSP by 44.72%, 29.25%, 54.82%, and 134.61%, respectively. Moreover, the SynMiCom promoted the fragmentation of the weathered WSP and significantly increased the activities of urease and invertase by 11.98% and 33.58%, and the contents of available nitrogen and available phosphorus by 71.64% and 50.15%, respectively. Furthermore, the SynMiCom significantly enriched endophytic beneficial bacteria (Rhizobiaceae and Sphingomonadaceae) and fungi (GS13_fam_Incertae_sedis), which showed positive correlations with chili growth and WSP physicochemical parameters.

Conclusion

The SynMiCom reshaped microbial network structure, promoted the cycling of N and P elements in the WSP, and thereby effectively promoted chili growth. These findings provided insights into the application of the SynMiCom in the resource utilization of WSP for the cultivation of economic crops.