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| Diurnal variation of ammonia and greenhouse gases emissions from crab and shrimp culture ponds in southern Jiangsu Province |
| Received:October 03, 2024 |
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| KeyWord:greenhouse gases flux;ammonia emission;water-gas interface;diurnal variation |
| Author Name | Affiliation | E-mail | | ZHAO Fei | Changshu National Agro-Ecosystem Observation and Research Station(Institute of Soil Science Chinese Academy of Sciences), Nanjing 210008, China
University of the Chinese Academy of Sciences, Beijing 100049, China
University of Chinese Academy of Sciences, Nanjing 211135, China | | | TIAN Yuhua | Changshu National Agro-Ecosystem Observation and Research Station(Institute of Soil Science Chinese Academy of Sciences), Nanjing 210008, China
University of the Chinese Academy of Sciences, Beijing 100049, China
University of Chinese Academy of Sciences, Nanjing 211135, China | | | YIN Bin | Changshu National Agro-Ecosystem Observation and Research Station(Institute of Soil Science Chinese Academy of Sciences), Nanjing 210008, China
University of the Chinese Academy of Sciences, Beijing 100049, China
University of Chinese Academy of Sciences, Nanjing 211135, China | | | ZHAO Xu | Changshu National Agro-Ecosystem Observation and Research Station(Institute of Soil Science Chinese Academy of Sciences), Nanjing 210008, China
University of the Chinese Academy of Sciences, Beijing 100049, China
University of Chinese Academy of Sciences, Nanjing 211135, China | zhaoxu@issas.ac.cn |
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| Abstract: |
| In this study, the diurnal variations of greenhouse gases（N2O, CH4）and NH3 at the water surface-atmosphere interface of intensive crab-shrimp mixotrophic pond（C-SP） and shrimp monoculture pond（SP） were determined by the floating chamber-gas chromatography method and continuous airflow enclosure method respectively. In addition, meteorological conditions and physicochemical indexes of the water were recorded simultaneously. Both C-SP and SP ponds acted as the sources of N2O, CH4 and NH3 on the daily scale. In the C-SP and SP, the diurnal averaged fluxes were 0.10 mg·m-2·h-1 and 0.11 mg·m-2·h-1 for N2O, 0.18 mg·m-2·h-1 and 0.24 mg·m-2·h-1 for CH4, and 0.23 mg·m-2·h-1 and 0.12 mg·m-2·h-1 for NH3, respectively. There was a significant daily variation in NH3 emissions from CSP and SP with daily coefficients of variation of 54.23% and 92.80%, respectively. The CH4 release flux was significantly lower by 25.00% （n=7, P<0.05）and the NH3 emission flux was higher by 91.67% for C-SP as compared to SP. |
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