苏南蟹虾养殖塘氨和温室气体排放的昼夜变化特征

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中图分类号：S966.1；X171 文献标志码：A 文章编号：1672-2043（2025）07-1920-10

doi：10.11654/jaes.2024-0832

Diurnal variation of ammonia and greenhouse gases emissions from crab and shrimp culture ponds in southernJiangsu Province

ZHAOFei1，2，3，TIANYuhua1，2，3，YINBin1，2，3，ZHAOXu1，2，3

（1.ChangshuNationalAgro-Ecosystem ObservationandResearchStation（InstituteofSoil ScienceChineseAcademyof Sciences）， Nanjing210o8，ina;2.Uversityofthnseadeoienseig9，ina;3.Uversityofiecadef Sciences，Nanjing，China）

Abstract：In this study，the diurnal variations of greenhouse gases（ N2O ，CH4）and NH3atthe water surface-atmosphere interface of intensivecrab-shrimp mixotrophicpond（C-SP）and shrimpmonoculture pond（SP）weredeterminedbythefloatingchamber-gas chromatographyethodandcontinuousaifloweclosuremethodrespectively.Inaditioneteorologicalconditiosandpsicohmical indexes of the water were recorded simultaneously.Both C-SP and SP ponds acted as the sources of N 2O ，CH4and NH 13 on the daily scale. In the C-SP and SP，the diurnal averaged fluxes were 0.10mg⋅m-2⋅h-1 and 0.11mg⋅m-2⋅h-1 for N2O， 0.18mg⋅m-2⋅h-1 and 0.24mg⋅m-2⋅h-1 for CH4， and 0.23mg⋅m-2⋅h-1 and 0.12mg⋅m-2⋅h-1 for NH3，respectively.There was a significant daily variation in NH 3 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 NH 3 emission flux was higher by 91.67% for C-SP as compared to SP.

Keywords：greenhouse gases flux;ammonia emission; water-gas interface; diurnal variation

氨（ ΔNH3 ）是引发雾霾的重要底物，氧化亚氮L N2O ）、甲烷（ CH4 是造成温室效应的重要温室气体。（剩余21977字）