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<p>The coffee industry generates significant amounts organic residues that, if mismanaged, can lead to environmental degradation. Valorization techniques such as composting, Bokashi fermentation, and pyrolysis (biochar production) offer sustainable avenues to enhance soil fertility and health while promoting a circular economy. This study aimed to evaluate the effects of various coffee residue-derived conditioners on soil properties and coffee productivity.&#xa0;Field trials were conducted over two agricultural seasons (2021/2022 and 2022/2023) in Minas Gerais state, Brazil. Treatments included coffee husk, compost, Bokashi, biochar (from coffee husk and wood), a compost-biochar blend (COMBI), organomineral fertilizer, and conventional fertilizer. The experiment followed a randomized block design with four replications. Soil properties, biological indicators, and coffee yield were assessed. Principal component analysis was used to identify key variables influencing treatment efficacy.&#xa0;COMBI notably increased calcium and magnesium levels by 50% and 46%, respectively, and enhanced base saturation by 24% in the first season. In the second season, biochar application led to a 20% increase in cation exchange capacity. COMBI also improved microbial biomass carbon and urease activity by 8% and 21%, respectively, compared to conventional fertilization. Despite improvements in soil properties and biological indicators, no significant effects on coffee yield were observed.&#xa0;These findings underscore the potential of coffee residue valorization in sustainable soil management. Although short-term impacts on productivity were not detected, soil improvements highlight the promise of these conditioners for enhancing soil quality and promoting circular agricultural systems.</p> Graphical Abstract <p></p>

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Management of Organic Residues in the Coffee Production Chain and their Impact on Soil Attributes for the Promotion of Circular Economy

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月16日

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  • Thiago Costa Viana,
  • Thiago de Assis Pereira,
  • Silvia Helena Soares Torres,
  • Silvia Maria Oliveira-Longatti,
  • Aline do Amaral Leite,
  • Daniela Dourado Leal Queiroz,
  • Julián Orlando Sandoval Cuéllar,
  • Ana Maria Villarreal Barreira,
  • Andrés Olaya Montes,
  • Fatima Maria de Souza Moreira,
  • Leônidas Carrijo Azevedo Melo

摘要

The coffee industry generates significant amounts organic residues that, if mismanaged, can lead to environmental degradation. Valorization techniques such as composting, Bokashi fermentation, and pyrolysis (biochar production) offer sustainable avenues to enhance soil fertility and health while promoting a circular economy. This study aimed to evaluate the effects of various coffee residue-derived conditioners on soil properties and coffee productivity. Field trials were conducted over two agricultural seasons (2021/2022 and 2022/2023) in Minas Gerais state, Brazil. Treatments included coffee husk, compost, Bokashi, biochar (from coffee husk and wood), a compost-biochar blend (COMBI), organomineral fertilizer, and conventional fertilizer. The experiment followed a randomized block design with four replications. Soil properties, biological indicators, and coffee yield were assessed. Principal component analysis was used to identify key variables influencing treatment efficacy. COMBI notably increased calcium and magnesium levels by 50% and 46%, respectively, and enhanced base saturation by 24% in the first season. In the second season, biochar application led to a 20% increase in cation exchange capacity. COMBI also improved microbial biomass carbon and urease activity by 8% and 21%, respectively, compared to conventional fertilization. Despite improvements in soil properties and biological indicators, no significant effects on coffee yield were observed. These findings underscore the potential of coffee residue valorization in sustainable soil management. Although short-term impacts on productivity were not detected, soil improvements highlight the promise of these conditioners for enhancing soil quality and promoting circular agricultural systems.

Graphical Abstract