DOI: 10.1111/gcb.12595
论文题名: Interannual variation in nitrous oxide emissions from perennial ryegrass/white clover grassland used for dairy production
作者: Burchill W. ; Li D. ; Lanigan G.J. ; Williams M. ; Humphreys J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 10 起始页码: 3137
结束页码: 3146
语种: 英语
英文关键词: Freeze-thaw cycles
; Grazing
; Interannual variation
; Nitrous oxide
; Rainfall
; Regulating factors
; White clover grassland
Scopus关键词: agricultural emission
; annual variation
; emission inventory
; freeze-thaw cycle
; grassland
; grazing
; nitrogen cycle
; nitrous oxide
; perennial plant
; rainfall
; Ireland
; Trifolium
; Trifolium repens
; air pollutant
; fertilizer
; nitrous oxide
; air pollutant
; analysis
; climate
; clover
; dairying
; grassland
; Ireland
; Lolium
; metabolism
; Air Pollutants
; Climate
; Dairying
; Fertilizers
; Grassland
; Ireland
; Lolium
; Nitrous Oxide
; Trifolium
英文摘要: Nitrous oxide (N2O) emissions are subject to intra- and interannual variation due to changes in weather and management. This creates significant uncertainties when quantifying estimates of annual N2O emissions from grazed grasslands. Despite these uncertainties, the majority of studies are short-term in nature (<1 year) and as a consequence, there is a lack of data on interannual variation in N2O emissions. The objectives of this study were to (i) quantify annual N2O emissions and (ii) assess the causes of interannual variation in emissions from grazed perennial ryegrass/white clover grassland. Nitrous oxide emissions were measured from fertilized and grazed perennial ryegrass/white clover grassland (WC) and from perennial ryegrass plots that were not grazed and did not receive N input (GB), over 4 years from 2008 to 2012 in Ireland (52°51'N, 08°21'W). The annual N2O-N emissions (kg ha-1; mean ± SE) ranged from 4.4 ± 0.2 to 34.4 ± 5.5 from WC and from 1.7 ± 0.8 to 6.3 ± 1.2 from GB. Interannual variation in N2O emissions was attributed to differences in annual rainfall, monthly (December) soil temperatures and variation in N input. Such substantial interannual variation in N2O emissions highlights the need for long-term studies of emissions from managed pastoral systems. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62204
Appears in Collections: 影响、适应和脆弱性
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作者单位: Animal and Grassland Research and Innovation Centre, Teagasc, Moorepark, Fermoy, Co. Cork, Ireland; Department of Botany, School of Natural Sciences, Trinity College Dublin, College Green, Dublin 2, Ireland; Huanjiang Observation and Research Station for Karst Ecosystems, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China; Johnstown Castle Environment Research Centre, Teagasc, Johnstown Castle, Co. Wexford, Ireland
Recommended Citation:
Burchill W.,Li D.,Lanigan G.J.,et al. Interannual variation in nitrous oxide emissions from perennial ryegrass/white clover grassland used for dairy production[J]. Global Change Biology,2014-01-01,20(10)