气候变化领域集成服务门户(CCPortal): Where should we apply biochar?

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DOI	10.1088/1748-9326/aafcf0
	Where should we apply biochar?
	Dokoohaki H.; Miguez F.E.; Laird D.; Dumortier J.
发表日期	2019
ISSN	17489318
卷号	14 期号:4
英文摘要	The heating of biomass under low-oxygen conditions generates three co-products, bio-oil, biogas, and biochar. Bio-oil can be stabilized and used as fuel oil or be further refined for various applications and biogas can be used as an energy source during the low-oxygen heating process. Biochar can be used to sequester carbon in soil and has the potential to increase crop yields when it is used to improve yield-limiting soil properties. Complex bio-physical interactions have made it challenging to answer the question of where biochar should be applied for the maximum agronomic and economic benefits. We address this challenge by developing an extensive informatics workflow for processing and analyzing crop yield response data as well as a large spatial-scale modeling platform. We use a probabilistic graphical model to study the relationships between soil and biochar variables and predict the probability and magnitude of crop yield response to biochar application. Our results show an average increase in crop yields ranging from 4.7% to 6.4% depending on the biochar feedstock and application rate. Expected yield increases of at least 6.1% and 8.8% are necessary to cover 25% and 10% of US cropland with biochar. We find that biochar application to crop area with an expected yield increase of at least 5.3%-5.9% would result in carbon sequestration offsetting 0.57%-0.67% of US greenhouse gas emissions. Applying biochar to corn area is the most profitable from a revenue perspective when compared to soybeans and wheat because additional revenues accrued by farmers are not enough to cover the costs of biochar applications in many regions of the United States. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	biochar; carbon sequestration; large spatial scale modeling
语种	英语
scopus关键词	Biogas; Carbon; Crops; Economics; Gas emissions; Greenhouse gases; Oxygen; Soils; Application rates; Bio chars; Carbon sequestration; Economic benefits; Large spatial scale; Low oxygen conditions; Physical interactions; Probabilistic graphical models; Petroleum refining; biochar; carbon sequestration; crop yield; greenhouse gas; heating; modeling; United States; Glycine max; Triticum aestivum; Zea mays
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154645
作者单位	Earth and Environment, Boston University, Boston, MA 02215, United States; Department of Agronomy, Iowa State University, Ames, IA 50011, United States; School of Public and Environmental Affairs, Indiana University, Purdue University Indianapolis, Indianapolis, IN 46202, United States
推荐引用方式 GB/T 7714	Dokoohaki H.,Miguez F.E.,Laird D.,et al. Where should we apply biochar?[J],2019,14(4).
APA	Dokoohaki H.,Miguez F.E.,Laird D.,&Dumortier J..(2019).Where should we apply biochar?.Environmental Research Letters,14(4).
MLA	Dokoohaki H.,et al."Where should we apply biochar?".Environmental Research Letters 14.4(2019).