Biochar-plant interaction and detoxification strategies under abiotic stresses for achieving agricultural sustainability: A critical review

Abstract

The unpredictable climatic perturbations, the expanding industrial and mining sectors, excessive agrochemicals, greater reliance on wastewater usage in cultivation, and landfill leachates, are collectively causing land degradation and affecting cultivation, thereby reducing food production globally. Biochar can generally mitigate the unfavourable effects brought about by climatic perturbations (drought, waterlogging) and degraded soils to sustain crop production. It can also reduce the bioavailability and phytotoxicity of pollutants in contaminated soils via the immobilization of inorganic and/or organic contaminants, commonly through surface complexation, electrostatic attraction, ion exchange, adsorption, and co-precipitation. When biochar is applied to soil, it typically neutralizes soil acidity, enhances cation exchange capacity, water holding capacity, soil aeration, and microbial activity. Thus, biochar has been was widely used as an amendment to ameliorate crop abiotic/biotic stress. This review discusses the effects of biochar addition under certain unfavourable conditions (salinity, drought, flooding and heavy metal stress) to improve plant resilience undergoing these perturbations. Biochar applied with other stimulants like compost, humic acid, phytohormones, microbes and nanoparticles could be synergistic in some situation to enhance plant resilience and survivorship in especially saline, waterlogged and arid conditions. Overall, biochar can provide an effective and low-cost solution, especially in nutrient-poor and highly degraded soils to sustain plant cultivation.

Keywords

Charcoal; Ecophysiology; Food security; Photosynthesis; Oxidative stress; Land degradation

Published in

Ecotoxicology and Environmental Safety
2023, volume: 249, article number: 114408

SLU Authors

• Yong, Jean W.H

  • Department of Biosystems and Technology, Swedish University of Agricultural Sciences
    

Associated SLU-program

SLU Plant Protection Network

Global goals (SDG)

SDG2 Zero hunger
SDG13 Climate action
SDG15 Life on land

UKÄ Subject classification

Botany
Soil Science
Horticulture

Publication identifier

• DOI: https://doi.org/10.1016/j.ecoenv.2022.114408

Permanent link to this page (URI)

https://res.slu.se/id/publ/119870