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Impacts of Biochar and Vermicompost Addition on Physicochemical Characteristics, Metal Availability, and Microbial Communities in Soil Contaminated with Potentially Toxic Elements

Author

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  • Zhiyue Huang

    (College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China)

  • Wenjuan He

    (College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China)

Abstract

In the current work, the effects of biochar, vermicompost, as well as their combined application on ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in soils contaminated with potentially toxic elements (PTEs) were investigated. In this regard, four treatments were performed; among them, treatment A served as a control without additive, treatment B with vermicompost (2%), treatment C with biochar (2%), and treatment D with biochar (2%) plus vermicompost (2%). In addition, the abundance and structure of the AOA and AOB amoA gene were measured using quantitative PCR and high-throughput sequencing. The relationships between the microbial community, physicochemical parameters, and CaCl 2 -extractable PTEs were analyzed using the Pearson correlation method. We found that adding biochar and vermicompost promoted the immobilization of PTEs and nitrogen biotransformation. The rational use of biochar and vermicompost is beneficial for the growth of bacterial and fungal communities in soils polluted by PTEs. AOA and AOB amoA genes were stimulated by biochar, vermicompost, and their combination, but their structure was hardly affected.

Suggested Citation

  • Zhiyue Huang & Wenjuan He, 2023. "Impacts of Biochar and Vermicompost Addition on Physicochemical Characteristics, Metal Availability, and Microbial Communities in Soil Contaminated with Potentially Toxic Elements," Sustainability, MDPI, vol. 15(1), pages 1-13, January.
  • Handle: RePEc:gam:jsusta:v:15:y:2023:i:1:p:790-:d:1022214
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    References listed on IDEAS

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    1. Hongwei Zhang & Jianhui Li & Yingying Zhang & Kui Huang, 2020. "Quality of Vermicompost and Microbial Community Diversity Affected by the Contrasting Temperature during Vermicomposting of Dewatered Sludge," IJERPH, MDPI, vol. 17(5), pages 1-12, March.
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