DOI: 10.1029/2018GB006091
论文题名: Global Nitrous Oxide Emissions From Pasturelands and Rangelands: Magnitude, Spatiotemporal Patterns, and Attribution
作者: Dangal S.R.S. ; Tian H. ; Xu R. ; Chang J. ; Canadell J.G. ; Ciais P. ; Pan S. ; Yang J. ; Zhang B.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期: 2 语种: 英语
英文关键词: agricultural emission
; climate change
; ecosystem modeling
; emission
; fertilizer application
; global change
; grassland
; magnitude
; management practice
; manure
; nitrous oxide
; pasture
; rangeland
; spatiotemporal analysis
; Asia
; Europe
; North America
学科: climate change
; ecosystem modeling
; excreta deposition
; grasslands
; manure/fertilizer application
中文摘要: The application of manure and mineral nitrogen (N) fertilizer, and livestock excreta deposition are the main drivers of nitrous oxide (N 2 O) emissions in agricultural systems. However, the magnitude and spatiotemporal variations of N 2 O emissions due to different management practices (excreta deposition and manure/fertilizer application) from grassland ecosystems remain unclear. In this study, we used the Dynamic Land Ecosystem Model to simulate the spatiotemporal variation in global N 2 O emissions and their attribution to different sources from both intensively managed (pasturelands) and extensively managed (rangelands) grasslands during 1961–2014. Over the study period, pasturelands and rangelands experienced a significant increase in N 2 O emissions from 1.74 Tg N 2 O-N in 1961 to 3.11 Tg N 2 O-N in 2014 (p < 0.05). Globally, pasturelands and rangelands were responsible for 54% (2.2 Tg N 2 O-N) of the total agricultural N 2 O emissions (4.1 Tg N 2 O-N) in 2006. Natural and anthropogenic sources contributed 26% (0.64 Tg N 2 O-N/year) and 74% (1.78 Tg N 2 O-N/year) of the net emissions, respectively. Across different biomes, pasturelands (i.e., C3 and C4) were the single largest contributor to N 2 O fluxes, accounting for 86% of the net global emissions from grasslands. Among different sources, livestock excreta deposition contributed 54% of the net emissions, followed by manure N (13%) and mineral N (7%) application. Regionally, southern Asia contributed 38% of the total emissions, followed by Europe (29%) and North America (16%). Our modeling study demonstrates that livestock excreta deposition and manure/fertilizer application have dramatically altered the N cycle in pasturelands, with a substantial impact on the climate system. ©2019. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160149
Appears in Collections: 气候变化与战略
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作者单位: International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, United States; Woods Hole Research Center, Falmouth, MA, United States; Research Center for Eco-Environmental Sciences, State Key Laboratory of Urban and Regional Ecology, Chinese Academy of Sciences, Beijing, China; Laboratoire des Sciences du Climat et de l'Environnement, Gif sur Yvette, France; Global Carbon Project, CSIRO Oceans and Atmosphere Research, Canberra, ACT, Australia; Now at Department of Natural Resources and Environmental Management, Ball State University, Muncie, IN, United States
Recommended Citation:
Dangal S.R.S.,Tian H.,Xu R.,et al. Global Nitrous Oxide Emissions From Pasturelands and Rangelands: Magnitude, Spatiotemporal Patterns, and Attribution[J]. Global Biogeochemical Cycles,2019-01-01,33(2)