DOI: 10.1016/j.atmosenv.2017.11.024
Scopus记录号: 2-s2.0-85035747357
论文题名: Annual methane budgets of sheep grazing systems were regulated by grazing intensities in the temperate continental steppe: A two-year case study
作者: Ma L ; , Zhong M ; , Zhu Y ; , Yang H ; , Johnson D ; A ; , Rong Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 174 起始页码: 66
结束页码: 75
语种: 英语
英文关键词: Faeces
; Grazing steppe
; Methane emission
; Sheep
; Sheepfold
; Soil methane uptake
Scopus关键词: Methane
; Soils
; Faeces
; Grazing steppe
; Methane emissions
; Sheep
; Sheepfold
; Budget control
; methane
; agricultural emission
; animal husbandry
; anthropogenic source
; carbon emission
; feces
; grazing management
; methane
; sheep
; steppe
; air temperature
; Article
; biomass
; budget
; China
; ecosystem
; grassland
; grazing
; grazing management
; growing season
; livestock
; liveweight gain
; meteorology
; precipitation
; priority journal
; ruminant
; seasonal variation
; sheep
; soil compaction
; soil temperature
; soil water content
; steppe
; vegetation
; China
; Animalia
; Ovis aries
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Methane (CH4) emission from animal husbandry accounts for a large percentage of anthropogenic contributions to CH4 emissions. Fully understanding of grazing management effects on the CH4 budget is essential for mitigating CH4 emissions in the temperate grazing steppe systems. Annual CH4 budgets for the sheep grazed steppes at various grazing intensities, un–grazing (UG, 0 sheep ha−1year−1), defer grazing (DG, 1.0 sheep ha−1 year−1), moderate grazing (MG, 1.43 sheep ha−1year−1), and heavy grazing (HG, 2.43 sheep ha−1year−1) were assessed across 2012–2014 in the agro–pastoral region of northern China. Annual soil CH4 uptake averaged across 2012–2014 were 1.1 ± 0.1, 2.4 ± 0.2, 2.2 ± 0.2, and 1.3 ± 0.1 kg CH4–C ha−1 for UG, DG (only 2013–2014), MG and HG sites. Non–growing season CH4 uptake comprised 50.0 ± 4.3% of annual CH4 uptake in 2012–2013 and 37.7 ± 2.0% in 2013–2014. DG and MG significantly promoted annual soil CH4 uptake (P < 0.05), while there was no difference between HG and UG (P > 0.05). Bell–shaped relationship was presented between stocking rates and soil CH4 uptake (r2 = 0.59, P < 0.05). Annual soil CH4 uptake significant linearly and positively correlated with root biomass (r2 = 0.30, P < 0.05). Annual CH4 budgets for the grazed grasslands were −1.1 ± 0.1, 5.7 ± 0.6, 11.5 ± 1.5 and 15.5 ± 1.3 kg CH4–C ha−1 year−1 in UG, DG (only 2013–2014), MG and HG across 2012–2014. Soil CH4 uptake could offset 29.7 ± 5.6, 15.9 ± 4.3 and 6.8 ± 1.0% of total annual CH4 emissions from sheep, sheepfold and faeces in DG, MG, and HG. All grazed steppes are sources for atmospheric CH4 and the magnitude is regulated by grazing intensities. Sheep CH4 emissions for 1–g liveweight gain were 0.21, 0.32 and 0.37 g CH4–C in DG, MG and HG, respectively. DG is the recommended grazing management in this region to achieve greater herbage mass, higher sheep performance and lower CH4 emissions simultaneously. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83093
Appears in Collections: 气候变化事实与影响
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作者单位: Grassland Department of Animal Science and Technology College, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; USDA–ARS Forage and Range Research Lab, Utah State University, Logan, UT, United States
Recommended Citation:
Ma L,, Zhong M,, Zhu Y,et al. Annual methane budgets of sheep grazing systems were regulated by grazing intensities in the temperate continental steppe: A two-year case study[J]. Atmospheric Environment,2018-01-01,174