Institute of Bioresource and Agriculture and the Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
Environ Sci Pollut Res Int. 2021 Sep;28(34):46894-46909. doi: 10.1007/s11356-021-14803-8. Epub 2021 Jul 14.
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. Graphical abstract.
文献表明，生物炭有可能在农业土壤中保留养分，避免大量养分流失。此外，生物炭的孔隙率和官能团在改良土壤时被证明可以增强土壤的理化性质，从而有能力促进特定微生物作为生物肥料的栖息，或增强土壤修复。它支持依赖规模的参数，并为基于自然的解决方案提供与生态系统服务和土壤-植被解决方案相关的服务。然而，需要对土壤微生物与生物炭多孔特性相互作用的机制进行详细研究，同时还需要研究微生物附着因子、在土壤中应用时的维持和脱落。最近的有价值的工作已经将植物促生菌浸渍在生物炭中，但观察到的结果并不一致。首先，生物炭的固有特性通过抑制群体感应信号改变了浸渍的命运，并且对吸附和/或生物膜形成的大孔要求没有得到很好的考虑。此外，对于生物炭表面，每个微生物的营养和补充要求以及吸附能力还没有得到很好的理解。需要大量信息来了解微生物吸附的机制以及影响吸附过程的因素，以及基质在土壤中即使被部署时的维持。研究方向应侧重于确定负责生物炭-微生物相互作用过程和微生物在生物炭上的命运的分子和化学机制，同时表达植物促生特性，这需要在实验室和田间试验中进行。图表摘要。
