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<p>Biochar and organic fertilizers are commonly used for the remediation of contaminated soils due to their effectiveness in improving soil quality, nutrient retention, and promoting plant growth. However, research on the combined effects of biochar and organic fertilizers on rhizosphere and non-rhizosphere soils remains limited. In this study, functional pellets of charcoal organic fertilizer (FPOF) was added at different doses to investigate its effects on the physicochemical characteristics of rhizosphere and non-rhizosphere soils, metal availability, and microbial communities. The results indicated that the addition of FPOF significantly increased the pH and electrical conductivity of both soil types. The 5% FPOF treatment notably enhanced microbial abundance and reduced the toxicity of Pb, Zn, and Cu, with more pronounced effects observed in rhizosphere soil compared to non-rhizosphere soil. Additionally, changes in the physicochemical properties of non-rhizosphere soil were more closely associated with alterations of phospholipid fatty acids than those in rhizosphere soil.</p>

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Remediation of Heavy Metal Contaminated Soil by Functional Pellets of Charcoal Organic Fertilizer: Rhizosphere and Non-Rhizosphere Soil Microorganisms

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Fanghong Li,
  • Xichen Zhao,
  • Renli Qi,
  • Liuqin He,
  • Dan Wan,
  • Jiachao Zhang,
  • Xiaobing Zhang,
  • Ying Wang,
  • Genyi Wu,
  • Hongli Huang,
  • Lin Luo,
  • Lihua Zhang

摘要

Biochar and organic fertilizers are commonly used for the remediation of contaminated soils due to their effectiveness in improving soil quality, nutrient retention, and promoting plant growth. However, research on the combined effects of biochar and organic fertilizers on rhizosphere and non-rhizosphere soils remains limited. In this study, functional pellets of charcoal organic fertilizer (FPOF) was added at different doses to investigate its effects on the physicochemical characteristics of rhizosphere and non-rhizosphere soils, metal availability, and microbial communities. The results indicated that the addition of FPOF significantly increased the pH and electrical conductivity of both soil types. The 5% FPOF treatment notably enhanced microbial abundance and reduced the toxicity of Pb, Zn, and Cu, with more pronounced effects observed in rhizosphere soil compared to non-rhizosphere soil. Additionally, changes in the physicochemical properties of non-rhizosphere soil were more closely associated with alterations of phospholipid fatty acids than those in rhizosphere soil.