Role of biochar in promoting circular economy in the agriculture sector. Part 1: A review of the biochar roles in soil N, P and K cycles

Keiji Jindo*, Yuki Audette, Fábio Satoshi Higashikawa, Carlos Alberto Silva, Kinya Akashi, Giovanni Mastrolonardo, Miguel Angel Sánchez-Monedero, Claudio Mondini

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Recently, biochar has been widely used for versatile applications in agriculture and environment sectors as an effective tool to minimise waste and to increase the efficiency of circular economy. In the present work, we review the current knowledge about biochar role in N, P and K cycles. Ammonia volatilisation and N2O emission can be reduced by biochar addition. The content of available P can be improved by biochar through enhancement of solubilisation and reduction in P fixation on soil mineral, whilst high extractable K in biochar contributes to K cycle in soil. Liming effect and high CEC are important properties of biochars improving beneficial interactions with N, P and K soil cycle processes. The effectiveness of biochar on N, P and K cycles is associated with biochar properties which are mainly affected by feedstock type and pyrolysis condition.[Figure not available: see fulltext.].

Original languageEnglish
Article number15
JournalChemical and Biological Technologies in Agriculture
Volume7
DOIs
Publication statusPublished - 13 Jul 2020

Keywords

  • Macro-nutrients
  • Nutrient cycle
  • Pyrogenic material

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