NOX fluxes from several typical agricultural fields during summer-autumn in the Yangtze Delta,China |
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| Authors: | Shuangxi Fang Mu Yujing |
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| Institution: | 1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing 100029, PR China.;1. Environment Research Institute, Shandong University, Qingdao 266237, China;2. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China;3. Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Hong Kong 999077, China;4. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;5. Univ Lyon, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur la Catalyse et l''Environnement de Lyon (IRCELYON), Villeurbanne F-69626, France;1. Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth and Environment, Chinese Academy of Sciences, Xi''an 710061, China;2. School of Physics and Centre for Climate and Air Pollution Studies, National University of Ireland Galway, Galway, Ireland;3. Centre for Atmospheric and Marine Sciences, Xiamen Huaxia University, Xiamen 361024, China;4. Shanghai Key Laboratory of Meteorology and Health, Shanghai 200030, China;5. The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China;6. Department of Environmental Sciences and Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;7. RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;8. Key Laboratory of Reservoir Aquatic Environment of CAS, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China;9. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China |
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| Abstract: | NOX fluxes from three kinds of vegetable lands and a rice field were measured during summer–autumn in the Yangtze Delta, China. The average NO fluxes from the rice fields (RF), celery field (CE), maize field (MA) and cowpea field (CP) were 4.1, 30.8, 54 and 32.2 ng N m?2 s?1, respectively; and the average NO2 fluxes were ?2.12, 0.68, 1.33 and 0.5 ng N m?2 s?1, respectively. The liquid N fertilizer (the mixture of swine excrement and urine) which is widely applied to vegetable lands by Chinese farmers was found to quickly stimulate NO emission, and have significant contribution to NO emission from the investigated vegetable lands. Apparent linearity correlations were found between NO2 fluxes and the ambient concentrations of the rice fields, with a compensation point of about 2.84 μg m?3. Total emissions of NO during summer–autumn time from this area were roughly estimated to be 4.1 and 8.4 Gg N for rice field and vegetable lands, respectively. |
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