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[1]GUO Xiaowei,DU Yangong,LI Yikang,et al.Effects of Vegetation Layers on Methane Flux in Alpine Meadow on the Tibetan Plateau[J].Research of Soil and Water Conservation,2015,22(01):146-152.

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Effects of Vegetation Layers on Methane Flux in Alpine Meadow on the Tibetan Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 01 Page number: 146-152 Column: Public date: 2015-02-28

Title:: Effects of Vegetation Layers on Methane Flux in Alpine Meadow on the Tibetan Plateau

Author(s):: GUO Xiaowei^1,2, DU Yangong¹, LI Yikang¹, ZHANG Fawei¹, LIN Li¹, LIU Shuli^1,2, OUYANG Jingzheng^1,2, CAO Guangmin¹; 1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: Tibetan Plateau; alpine meadows; methane flux; vegetation layer

CLC:: S812

DOI:: -

Abstract:: Soil methane oxidation is one of the important ecological functions of grassland, there have been many studies about methane flux in alpine meadow, while few of them is about effect of vegetation layer. In this study, we set up three treatments, ie. Nate alpine meadow (IHC), meadow with removal of aboveground biomass (RAB) and bare soil (RBB). Greenhouse gas fluxes were measured by using static chambers and gas chromatography. The result indicate that the vegetation layer had the significantly effect on methane oxidation of grassland, the three treatments showed decreasing CH₄ consumption rates in the following order: RBB[ (2.2±18.9) μg/(m²·h)] > RAB[ (32.3±14.7) μg/(m²·h)] > IHC[ (27.9±10.6) μg/(m²·h)] for the three years. Methane oxidation rate of rhizospheric soil and aboveground biomass were (23.5±18.3) μg/(m²·h) and (7.4±11.5) μg/(m²·h) during 2003—2004. The methane flux rate of bare soil decreased year by year, the flux rate were (-67.7±20.6) μg/(m²·h), (-60.7±18.5) μg/(m²·h), (-58.3±16.3) μg/(m²·h) and (-48.9±22.6) μg/(m²·h) in 2003, 2004, 2005 and 2006 growing season, respectively. The methane flux rate had well correlation with soil temperature and soil moisture in 5 cm depth.

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