Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau
作者： Yangong Du , Yingguang Cui , Xingliang Xu , Dongying Liang , Ruijun Long
DOI: 10.1007/S11104-008-9727-9
关键词:
摘要: Nitrous oxide (N(2)O) emission was measured in a Kobresia humilis meadow and Potentilla fruticosa the Qinghai-Tibet Plateau from June 2003 to July 2006. Five treatments were setup two alpine meadows. Two bare soil K. (BSK) P. (BSP) by removing above- belowground plant biomass. Three community with one (herbaceous meadow-HCK) meadow-HCP, shrub meadow-SCP). BSP estimated be 38.1 +/- 3.6 mu g m(-2) h(-1), significantly higher than BSK (30.2 2.8 h(-1)) during whole experiment period. Rates herbaceous blocks (HCK HCP) close 39.5 stop h(-1) experimental period whereas (SCP) showed significant high rates of N(2)O. Annual rate N(2)O 356.7 8.3 295.0 11.6 mg year(-1) meadow, respectively. These results suggest that meadows Qinghai-Tibetan are an important source N(2)O, contributing average 0.3 Tg year(-1). We concluded will decrease, due predicted vegetation shift shrubs grasses imposed overgrazing.
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