DOI: 10.1007/s10533-013-9923-4
Scopus记录号: 2-s2.0-84896395158
论文题名: Food and feed trade as a driver in the global nitrogen cycle: 50-year trends
作者: Lassaletta L. ; Billen G. ; Grizzetti B. ; Garnier J. ; Leach A.M. ; Galloway J.N.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 118, 期: 2018-01-03 起始页码: 225
结束页码: 241
语种: 英语
英文关键词: Crop production
; Global nitrogen cycle
; Human diet
; International trade
; Livestock production
Scopus关键词: crop production
; environmental impact
; livestock
; livestock farming
; nitrogen cycle
; protein
; trade-environment relations
; South America
; United States
; Animalia
英文摘要: The alteration of the global nitrogen (N) cycle is creating severe environmental impacts. This paper analyses the increasing importance of the international trade of food and feed in the alteration of the N cycle at the global scale in two ways. First, using the information on food and feed trade across world countries, and assuming that N constitutes 16 % of proteins, we quantified the N annually traded in the period 1961-2010. We observed that in that period, the amount of N traded between countries has increased eightfold (from 3 to 24 TgN) and now concerns one-third of the total N in world crop production, with the largest part corresponding to animal feed. Secondly, we divided the world into 12 regions and studied the N transfer among them in two reference years: 1986 and 2009. The N flow among these regions has dramatically intensified during this period not only due to an increase in the population but also in the proportion of animal protein in the diet of some countries. Nowadays, in terms of proteins and N, a small number of countries (e.g., USA, Argentina and Brazil) are feeding the rest of the world. At the global scale the system is becoming less efficient because of the disconnection between crop and livestock production across specialised regions, increasing the environmental impacts. As human diet is an additional clear driver of the observed changes, the solutions must rely not only on the producers, but also on the consumers. The results of our study provide new insights into the food dependency relationships between the different regions of the world as well as the growing importance of international food and feed trade in the global N cycle. © 2013 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83687
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: CNRS/Université Pierre et Marie Curie, UMR 7619 Sisyphe, 4 place Jussieu, 75005 Paris, France; Environmental Sciences Department, University of Virginia, 291 McCormick Road, PO Box 400123, Charlottesville, VA, 22904, United States
Recommended Citation:
Lassaletta L.,Billen G.,Grizzetti B.,et al. Food and feed trade as a driver in the global nitrogen cycle: 50-year trends[J]. Biogeochemistry,2014-01-01,118(2018-01-03)