气候变化领域集成服务门户(CCPortal): Co-benefits of intercropping as a sustainable farming method for safeguarding both food security and air quality

CCPortal

DOI	10.1088/1748-9326/aafc8b
	Co-benefits of intercropping as a sustainable farming method for safeguarding both food security and air quality
	Fung K.M.; Tai A.P.K.; Yong T.; Liu X.; Lam H.-M.
发表日期	2019
ISSN	17489318
卷号	14 期号:4
英文摘要	Large-scale, industrialized farming has contributed significantly to the increased global food supply to feed the fast-growing world population over the past few decades, but it also comes with severe threats to the environment. In particular, the excessive application of chemical fertilizer has led to large emissions of reactive nitrogen compounds into the atmosphere, where they become significant components of fine particulate matter (PM2.5) air pollution. Intercropping has been considered as a sustainable agricultural practice that can reduce the environmental impacts of agriculture, but its potential benefits beyond the farm scale have rarely been examined. Here we develop a new parameterization scheme for belowground mutualistic interactions between intercropped crops in the DeNitificaiton-DeComposition biogeochemical model, which is then used to simulate and quantify the benefits of nationwide adoption of maize-soybean systems in China in terms of gains in crop production, decreases in fertilizer consumption, and reductions in ammonia (NH3) emission. We further examine how such a decline in NH3 emission could lessen the downwind formation of PM2.5 using the GEOS-Chem chemical transport model. We show that annual mean inorganic PM2.5 concentrations can be reduced by up to 1.5 μg m-3 with the nationwide adoption of maize-soybean intercropping, with a corresponding annual net economic benefit of US$67 billion, of which US$13 billion arises from saved health costs from reduced air pollution. This study demonstrates the economic and environmental values of intercropping systems in dually promoting food security and environmental health, which can serve as a basis for policy consideration as governments and stakeholders explore more sustainable farming options. © 2019 2018 The Author(s). Published by IOP Publishing Ltd.
英文关键词	biogeosciences; China; DNDC; food security; GEOS-Chem; PM2.5; sustainable farming
语种	英语
scopus关键词	Air quality; Ammonia; Crops; Cultivation; Food supply; Nitrogen fertilizers; biogeosciences; China; DNDC; Food security; GEOS-Chem; PM2.5; Sustainable Farming; Sustainable development; agricultural practice; air quality; atmospheric pollution; cost-benefit analysis; emission; environmental economics; environmental values; food security; food supply; intercropping; particulate matter; China; United States; Glycine max; 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/154647
作者单位	Earth System Science Programme and Graduate Division of Earth and Atmospheric Sciences, Chinese University of Hong Kong, Hong Kong, Hong Kong; State Key Laboratory of Agrobiotechnology, Chinese University of Hong Kong, Hong Kong, Hong Kong; Institute of Environment, Energy and Sustainability, Chinese University of Hong Kong, Hong Kong, Hong Kong; College of Agronomy, Sichuan Agricultural University, Sichuan, China; Shehong Agricultural Technology Station, Sichuan, China; School of Life Sciences, Chinese University of Hong Kong, Hong Kong, Hong Kong
推荐引用方式 GB/T 7714	Fung K.M.,Tai A.P.K.,Yong T.,et al. Co-benefits of intercropping as a sustainable farming method for safeguarding both food security and air quality[J],2019,14(4).
APA	Fung K.M.,Tai A.P.K.,Yong T.,Liu X.,&Lam H.-M..(2019).Co-benefits of intercropping as a sustainable farming method for safeguarding both food security and air quality.Environmental Research Letters,14(4).
MLA	Fung K.M.,et al."Co-benefits of intercropping as a sustainable farming method for safeguarding both food security and air quality".Environmental Research Letters 14.4(2019).