Wang Hao, Nan Qiong, Waqas Muhammad, Wu Weixiang
Institute of Environmental Science and Technology, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China.
Department of Botanical and Environmental Science, Kohat University of Science and Technology, Pakistan.
Sci Total Environ. 2022 Feb 1;806(Pt 4):150789. doi: 10.1016/j.scitotenv.2021.150789. Epub 2021 Oct 4.
Amendment of biochar into mineral soils has been reported a promising strategy for carbon sequestration and greenhouse gas mitigation due to its high stability. Currently, most studies on the stability of biochar are mainly focused on the assessment methods and influencing factors. The assessment methods include qualitative evaluation of physical and chemical properties, and utilization of kinetic mineralization models on the basis of laboratory incubation. As a result, these assessment methods are difficult to accurately reflect the real impact of the interaction between biochar and environmental factors. This article reviews the existing assessment methods, influencing factors, and the impact of environmental aging on the stability of biochar. It is found that under the influence of environmental factors, existing assessment methods are likely to overestimate the stability of biochar in mineral soils. Therefore, more emphases should be laid on the analyses of the deficiencies in the existing assessment methods on the stability of biochar in the consideration of practical applications. Long-term field experiment is strongly recommended to establish a more accurate assessment model on biochar stability for the evaluation of its carbon sequestration potential in mineral soils.
由于生物炭具有较高的稳定性，将其添加到矿质土壤中已被报道是一种有前景的碳固存和温室气体减排策略。目前，大多数关于生物炭稳定性的研究主要集中在评估方法和影响因素上。评估方法包括对物理和化学性质的定性评估，以及基于实验室培养的动力学矿化模型的应用。因此，这些评估方法难以准确反映生物炭与环境因素相互作用的实际影响。本文综述了现有的评估方法、影响因素以及环境老化对生物炭稳定性的影响。研究发现，在环境因素的影响下，现有的评估方法可能会高估生物炭在矿质土壤中的稳定性。因此，在实际应用中，应更加重视对现有生物炭稳定性评估方法不足之处的分析。强烈建议进行长期田间试验，以建立更准确的生物炭稳定性评估模型，用于评估其在矿质土壤中的碳固存潜力。
