Modelling the potential for soil carbon sequestration using biochar from sugarcane residues in Brazil.
Modelling the potential for soil carbon sequestration using biochar from sugarcane residues in Brazil.
复制标题
使用巴西甘蔗残基的生物炭建模土壤碳固相的潜力。
DOI：
10.1038/s41598-020-76470-y
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发表时间：
2020-11-10
影响因子：
4.6
通讯作者：
Smith P
中科院分区：
文献类型：
--
作者：
Lefebvre D;Williams A;Meersmans J;Kirk GJD;Sohi S;Goglio P;Smith P
甘蔗（Cycloum officinarum L.）在收获和加工后，种植留下约20吨公顷的生物质残留物。我们研究了通过将这些残留物部分转化为生物炭（顽固的富碳物质）来用这些残留物封存土壤中碳（C）的潜力。首先，我们修改了RothC模型，允许土壤中的碳的变化所产生的甘蔗衍生的生物炭的添加。其次，我们评估了修改后的模型对已发表的现场数据，并发现令人满意的协议之间的观测和预测土壤C积累。第三，我们使用该模型来探索巴西圣保罗州甘蔗生物炭土壤固碳的潜力。结果表明，在全州甘蔗田中，施用量为4.2 t生物炭ha− 1 year− 1时，土壤碳储量可能增加2.35 ± 0.4 t C ha− 1 year− 1。按该州甘蔗总面积计算，这将是5000万吨二氧化碳当量年-1，这是该州2016年二氧化碳当量排放量的31%。未来的研究应（a）通过实地实验进一步验证模型;（B）对温室气体减排潜力进行全生命周期评估，包括生物炭应用对温室气体平衡的额外影响。
Sugarcane (Saccharum officinarum L.) cultivation leaves behind around 20 t ha−1 of biomass residue after harvest and processing. We investigated the potential for sequestering carbon (C) in soil with these residues by partially converting them into biochar (recalcitrant carbon-rich material). First, we modified the RothC model to allow changes in soil C arising from additions of sugarcane-derived biochar. Second, we evaluated the modified model against published field data, and found satisfactory agreement between observed and predicted soil C accumulation. Third, we used the model to explore the potential for soil C sequestration with sugarcane biochar in São Paulo State, Brazil. The results show a potential increase in soil C stocks by 2.35 ± 0.4 t C ha−1 year−1 in sugarcane fields across the State at application rates of 4.2 t biochar ha−1 year−1. Scaling to the total sugarcane area of the State, this would be 50 Mt of CO2 equivalent year−1, which is 31% of the CO2 equivalent emissions attributed to the State in 2016. Future research should (a) further validate the model with field experiments; (b) make a full life cycle assessment of the potential for greenhouse gas mitigation, including additional effects of biochar applications on greenhouse gas balances.
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影响因子：
5.8
作者：
Haefele, S. M.;Konboon, Y.;Knoblauch, C.
通讯作者：
Knoblauch, C.
影响因子：
6.6
作者：
Cayuela, M. L.;Jeffery, S.;van Zwieten, L.
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van Zwieten, L.
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作者：
Cardoso, T. F.;Chagas, M. F.;Bonomi, A.
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Caldeira-Pires, Armando;Benoist, Anthony;Machado, Frederico S.
通讯作者：
Machado, Frederico S.
影响因子：
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作者：
Cerri, Carlos E. P.;Easter, Mark;Cerri, Carlos C.
通讯作者：
Cerri, Carlos C.