DOI: 10.1016/j.atmosenv.2015.01.036
Scopus记录号: 2-s2.0-84921498034
论文题名: Methane uptake and emissions in a typical steppe grazing system during the grazing season
作者: Wang X ; , Zhang Y ; , Huang D ; , Li Z ; , Zhang X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 105 起始页码: 14
结束页码: 21
语种: 英语
英文关键词: Methane
; Seasonal grazing
; Sheep
; Typical steppes
; Uptake and emission
Scopus关键词: Agriculture
; Ecosystems
; Methane
; Grassland ecosystems
; Grassland soils
; Grazing systems
; Livestock grazing
; Research stations
; Seasonal grazing
; Sheep
; Typical steppes
; Soils
; methane
; air pollution
; air temperature
; Article
; biomass
; environmental factor
; food intake
; grassland
; grazing
; limit of detection
; livestock
; moisture
; nonhuman
; priority journal
; seasonal variation
; soil moisture
; soil temperature
; steppe
; 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: This study investigated the effects of livestock grazing on CH4 emissions by testing six grazing conditions at Guyuan State Key Monitoring and Research Station of Grassland Ecosystem (China) in 2011 and 2012. Under all grazing systems, steppe soils were measured to be CH4 sinks. The uptake of CH4 by grassland was primarily determined by topsoil (7cm) temperature and soil (0-7cm) moisture in grassland at short-term grazing and non-grazing. The cumulative uptake of CH4 during the grazing period for all conditions was 0.88-3.23kghm-2 CH4, and the highest level was observed in the continuously moderate grazing condition. Reducing grazing stocking in the short-term did not significantly change the uptake of CH4 when compared with continuously heavy grazing condition. Enteric CH4 emissions were not significantly affected by the grazing period or conditions. The uptake of CH4 by grassland soil offset 3.1-8.6% of the CH4 emissions from the grazing sheep and was most effective at the continuously moderate grazing condition. These findings imply that continuously moderate grazing is the best approach considered here for optimizing the soil as a sink for atmospheric CH4. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81988
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Grassland Science, College of Animal Science and Technology, China Agricultural University, West Road 2 Yuan Ming Yuan, Beijing MD, China
Recommended Citation:
Wang X,, Zhang Y,, Huang D,et al. Methane uptake and emissions in a typical steppe grazing system during the grazing season[J]. Atmospheric Environment,2015-01-01,105