DOI: 10.1016/j.atmosenv.2015.09.073
Scopus记录号: 2-s2.0-84943803764
论文题名: Changes of soil CO2 flux under different stocking rates during spring-thaw period in a northern desert steppe, China
作者: Tang S ; , Zhang Y ; , Guo Y ; , Zhai X ; , Wilkes A ; , Han G ; , Jiang Y ; , Liu K ; , Zhou P ; , Wang K ; , Wang C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 343
结束页码: 348
语种: 英语
英文关键词: Carbon dioxide
; Desert steppe
; Inner Mongolia
; Spring thaw period
; Stocking rate
Scopus关键词: Atmospheric chemistry
; Earth atmosphere
; Landforms
; Light measurement
; Soils
; Thawing
; Atmospheric carbon dioxide
; Desert steppe
; Empirical relationships
; Inner Mongolia
; Radiative balance
; Spring thaw
; Stocking rates
; Transition period
; Carbon dioxide
; carbon dioxide
; air-soil interaction
; carbon dioxide
; desert
; flux measurement
; gas exchange
; grazing
; radiation budget
; soil emission
; spatiotemporal analysis
; spring (season)
; steppe
; thawing
; Article
; carbon footprint
; China
; correlation analysis
; ecosystem
; freeze thawing
; grazing management
; nonhuman
; priority journal
; soil
; soil moisture
; soil temperature
; spectrophotometry
; spring
; stocking density
; winter
; China
; Nei Monggol
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: Atmospheric carbon dioxide (CO2) plays an important role in the radiative balance of the earth's atmosphere. Most studies have primarily focused on the growing season. However, few reports are available on CO2 emissions in the Inner Mongolian desert steppe ecosystem during the spring thaw period. To assess the responses of soil-atmosphere CO2 exchange to different stocking rates in the desert steppe, we conducted this study during the winter-spring transition period. The experiment was conducted with four treatments defined along a grazing gradient of un-grazing (UG), light grazing (LG), moderate grazing (MG) and heavy grazing (HG) with three replications of each treatment in the desert steppe of Inner Mongolia during the spring thaw period in 2010 and 2011. Soil CO2 fluxes were measured using Picarro G1301 (an automatic cavity ring-down spectrophotometer) in twelve grazing areas. Our results indicate that mean CO2 emission during the spring thaw period was 8.23 mg CO2-C m-2 h-1. Average CO2 fluxes over the two years during the spring thaw period were 10.59 mg CO2-C m-2 h-1 (UG), 8.10 mg CO2-C m-2 h-1 (LG), 7.89 mg CO2-C m-2 h-1 (MG) and 6.35 mg CO2-C m-2 h-1 (HG). Cumulative CO2 emission amounted to 118.51 kg C ha-1 during the spring thaw period (March-April) on average over two years. In this study, grazing practice significantly reduced CO2 emission during the spring thaw period in the desert steppe. Our results are in accordance with other findings suggesting that emissions of CO2 are regulated significantly by soil temperature during the spring thaw period in this area. The significant empirical relationships provide a simple way to estimate regional amounts of CO2 emission from desert steppe during the spring thaw period. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81350
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Grassland Science, China Agricultural University, Beijing, China; College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot, China; Institute of Grassland Science, Chinese Academy of Agricultural Science, Huhhot, China; College of Animal Science and Technology, Hebei North University, Zhangjiakou, China; Values for Development Limited, Bury St Edmunds, United Kingdom
Recommended Citation:
Tang S,, Zhang Y,, Guo Y,et al. Changes of soil CO2 flux under different stocking rates during spring-thaw period in a northern desert steppe, China[J]. Atmospheric Environment,2015-01-01,122