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| N2O flux from the mire in Ruoergai Plateau |
| WANG De-xuan1, SONG Chang-chun1, WANG Yue-si2, WANG Yi-yong1, YAN Bai-xing1, ZHAO Zhi-chun1 |
| 1. Northeast Institute of Geography and Agricultural Ecology, the Chinese Academy of Science, Changchun 130012; 2. Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100083 China |
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Abstract Ruoergai plateau mire is the largest distribution area of plateau peat mire in China.From the end of April to early October of 2004, the N2O flux was measured with the closed chamber/GC technique in Ruoergai plateau mire.The mean value of N2O flux was 0.010 mg·m-2h-1, the max value was 0.079 mg·m-2h-1, and the minimum was -0.051 mg·m-2h-1 from the mire.Seasonal change of N2O flux was negatively correlated with water depth in mire.Diurnal N2O flux was positively correlated with air temperature and peak value was found in the afternoon.In the plant growing season, total quantity of N2O emission from mire was about 0.159·a-1 in Rouergai plateau.
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Received: 25 June 2005
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