ABSTRACT

Sustainable agriculture has been consistently challenged due to the menace of changing climate, thereby, causing depletion in carrying capacity of soil vis-à-vis agronomic response of crop. Of late, biochar has turned out to be the most promising option to address these issues. The present review takes stock of the research work accrued under varied agro-pedological conditions, highlighting the response of biochar in a soil-plant-environment continuum. The properties of biochar depended hugely on the source of feedstock and pyrolysis conditions, with its uniqueness resting with high specific surface area and stable carbon source, pre-disposing to better soil health associated crop responses. However, the current biochar recommendations for different crops are high, unless evaluated in combination with fertilizers or organic manures to address both short-term and long-term benefits through soil carbon mediated nutrient supply chain for sustainable crop performance. The role of biochar in scavenging the soil pollutants and pesticide residues, and reducing the emission of greenhouse gases has perched this carbon source with an added advantage over other conventionally used carbon sources. Authors have put forward future issues with an emphasis on the development of crop-based value-chain management of biochar.

摘要

由于气候变化的威胁，可持续农业一直受到挑战，从而导致土壤承载能力相对于作物农艺反应的枯竭。最近，生物炭被证明是解决这些问题最有希望的选择。本综述评估了在不同农业土壤学条件下积累的研究工作，强调了生物炭在土壤-植物-环境连续体中的反应。生物炭的特性在很大程度上取决于原料来源和热解条件，其独特性在于具有高比表面积和稳定的碳源，可以预先处理更好的土壤健康相关作物反应。然而，目前针对不同作物的生物炭推荐值很高，除非结合肥料或有机肥料进行评估，以通过土壤碳介导的养分供应链实现短期和长期效益，从而实现可持续的作物性能。生物炭在清除土壤污染物和农药残留以及减少温室气体排放方面的作用使这种碳源比其他常规使用的碳源更具优势。作者提出了未来的问题，重点是发展基于作物的生物炭价值链管理。减少温室气体的排放使这种碳源比其他常规使用的碳源更具优势。作者提出了未来的问题，重点是发展基于作物的生物炭价值链管理。减少温室气体的排放使这种碳源比其他常规使用的碳源更具优势。作者提出了未来的问题，重点是发展基于作物的生物炭价值链管理。