Non-growing season soil CO2 efflux patterns in five land-use types in northern China

Heavy grazing and unsuitable farming practices have led to grassland degradation in northern China. This study examined soil CO2 efflux (Fc) from five land-use types during the non-growing season on the southeastern edge of the Mongolian Plateau in China. The land-use types included three native veg...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2016-11, Vol.144, p.160-167
Main Authors: Pan, Zhanlei, Johnson, Douglas A., Wei, Zhijun, Ma, Lei, Rong, Yuping
Format: Article
Language:English
Subjects:
Annual cropland
Carbon dioxide
Grazed steppe
Inter-annual variability
Leymus chinensis pasture
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Summary:Heavy grazing and unsuitable farming practices have led to grassland degradation in northern China. This study examined soil CO2 efflux (Fc) from five land-use types during the non-growing season on the southeastern edge of the Mongolian Plateau in China. The land-use types included three native vegetation steppes subjected to differing stocking rates [ungrazed (UG), moderately grazed (MG) and heavily grazed (HG)], a fertilized annual cropland (CL) and a perennial pasture (PP) used for haying and winter grazing. Values of Fc were measured at 3-day to 2-week intervals during the non-growing season in two contrasting hydrological years (2012-13 and 2013-14) using closed chambers. The Fc during 1 Oct. 2013 to 30 April 2014 averaged 475 mg C m−2 for all sites compared to a significantly (P 
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2016.08.085