Biochar porosity: a nature-based dependent parameter to deliver microorganisms to soils for land restoration

Jonathan W. C. Wong, Uchenna O. Ogbonnaya*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

Abstract

Literature shows that biochar can potentially retain nutrients in agricultural soils, avoiding significant nutrient losses. Furthermore, biochar porosity and functional groups have been shown to enhance physico-chemical properties of soil when amended, which in turn has the ability to encourage inhabitation of specific microorganisms as biofertilizers or to enhance soil remediation. It supports scale-dependent parameters and provides both ecosystem services and soil-vegetation solutions relevant to nature-based solutions. However, detailed researches on the mechanisms of soil microbial interactions with biochar porous properties are required, along with the microbial attachment factors, sustenance, and detachment when applied to soils. Recent valuable works have impregnated plant growth-promoting bacteria unto biochar and have observed inconsistent results. Firstly, biochar intrinsic properties alter the fate of impregnation by inhibiting quorum sensing signals, and the macropore requirements for adsorption and/or biofilm formation have not been well considered. Additionally, the nutrient and supplement requirements for each microorganism as well as the adsorption capacity have not been well understood for biochar surfaces. Substantial information is required to understand the mechanisms of microbe adsorption and factors that influence the process, as well as sustenance of the matrix even when deployed in soils. Research directions should focus on determining molecular and chemical mechanisms responsible for the biochar-microbe interaction process and fate of microbe on biochar while expressing plant growth-promoting properties, which needs to be done in laboratory and field trials.

Original languageEnglish
Pages (from-to)46894-46909
Number of pages16
JournalEnvironmental science and pollution research international
Volume28
Issue number34
DOIs
Publication statusPublished - Sep 2021

Scopus Subject Areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

User-Defined Keywords

  • Biochar
  • Biofertilizer
  • Macropore
  • Micropore
  • Phytohormone

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