气候变化领域集成服务门户(CCPortal): Biochar in climate change mitigation

CCPortal

DOI	10.1038/s41561-021-00852-8
	Biochar in climate change mitigation
	Lehmann J.; Cowie A.; Masiello C.A.; Kammann C.; Woolf D.; Amonette J.E.; Cayuela M.L.; Camps-Arbestain M.; Whitman T.
发表日期	2021
ISSN	1752-0894
卷号	14 期号:12
英文摘要	Climate change mitigation not only requires reductions of greenhouse gas emissions, but also withdrawal of carbon dioxide (CO2) from the atmosphere. Here we review the relationship between emissions reductions and CO2 removal by biochar systems, which are based on pyrolysing biomass to produce biochar, used for soil application, and renewable bioenergy. Half of the emission reductions and the majority of CO2 removal result from the one to two orders of magnitude longer persistence of biochar than the biomass it is made from. Globally, biochar systems could deliver emission reductions of 3.4–6.3 PgCO2e, half of which constitutes CO2 removal. Relevant trade-offs exist between making and sequestering biochar in soil or producing more energy. Importantly, these trade-offs depend on what type of energy is replaced: relative to producing bioenergy, emissions of biochar systems increase by 3% when biochar replaces coal, whereas emissions decrease by 95% when biochar replaces renewable energy. The lack of a clear relationship between crop yield increases in response to fertilizer and to biochar additions suggests opportunities for biochar to increase crop yields where fertilizer alone is not effective, but also questions blanket recommendations based on known fertilizer responses. Locally specific decision support must recognize these relationships and trade-offs to establish carbon-trading mechanisms that facilitate a judicious implementation commensurate with climate change mitigation needs. © 2021, Springer Nature Limited.
语种	英语
scopus关键词	biochar; carbon dioxide; climate change; emission control; greenhouse gas; pyrolysis; trade-off
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250821
作者单位	Soil and Crop Science, School of Integrative Plant Science, Cornell University, Ithaca, NY, United States; Cornell Atkinson Center for Sustainability, Cornell University, Ithaca, NY, United States; NSW Department of Primary Industries/University of New England, Armidale, NSW, Australia; Department of Earth, Environmental and Planetary Science, Rice University, Houston, TX, United States; Department of Applied Ecology, Geisenheim University, Geisenheim, Germany; Geochemistry, Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States; Center for Sustaining Agriculture & Natural Resources, Washington State University, Puyallup, WA, United States; Department of Soil and Water Conservation and Waste Management, CEBAS-CSIC, Campus Universitario de Espinardo, Murcia, Spain; School of Agriculture and Environment, Massey University, Palmerston North, New Zealand; Department of Soil Science, University of Wisconsin-Madison, Madison, WI, United States
推荐引用方式 GB/T 7714	Lehmann J.,Cowie A.,Masiello C.A.,et al. Biochar in climate change mitigation[J],2021,14(12).
APA	Lehmann J..,Cowie A..,Masiello C.A..,Kammann C..,Woolf D..,...&Whitman T..(2021).Biochar in climate change mitigation.Nature Geoscience,14(12).
MLA	Lehmann J.,et al."Biochar in climate change mitigation".Nature Geoscience 14.12(2021).