气候变化领域集成服务门户(CCPortal): Recirculation of human-derived nutrients from cities to agriculture across six continents

CCPortal

DOI	10.1038/s41893-018-0118-9
	Recirculation of human-derived nutrients from cities to agriculture across six continents
	Trimmer J.T.; Guest J.S.
发表日期	2018
ISSN	2398-9629
起始页码	427
结束页码	435
卷号	1 期号:8
英文摘要	Recovering human-derived nutrients can advance circular economies by linking increasingly urban global populations with local cropland, offsetting unsustainable fertilizer use and improving access in low-income countries. For 56 of the world’s largest cities, we analyse co-location of urban nutrients with surrounding agricultural needs (that is, the degree to which recoverable nutrients spatially align with crop demands), defining paths forward to close urban nutrient cycles. Estimated nutrient transport distances, which may constrain what recovery strategies are locally feasible, span two orders of magnitude and are often shorter among European, African and Asian cities due to high local cropland density. We further examine how growing nutrient-intensive crops and recovering highly concentrated nutrient products could impact distance and energy requirements. Broadly, locations with high cropland density, nutrient-intensive crops and compact urban area may find agricultural nutrient reuse particularly impactful and achievable, creating opportunities to boost productivity by coupling urban water and regional agriculture systems. © 2018, The Author(s).
语种	英语
scopus关键词	Crops; Recovery; Water conservation; Agricultural nutrients; Agriculture systems; Energy requirements; Global population; Low income countries; Nutrient transport; Orders of magnitude; Recovery strategies; Nutrients
来源期刊	Nature Sustainability
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/163519
作者单位	Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States
推荐引用方式 GB/T 7714	Trimmer J.T.,Guest J.S.. Recirculation of human-derived nutrients from cities to agriculture across six continents[J],2018,1(8).
APA	Trimmer J.T.,&Guest J.S..(2018).Recirculation of human-derived nutrients from cities to agriculture across six continents.Nature Sustainability,1(8).
MLA	Trimmer J.T.,et al."Recirculation of human-derived nutrients from cities to agriculture across six continents".Nature Sustainability 1.8(2018).