期刊
ATMOSPHERIC ENVIRONMENT
卷 45, 期 5, 页码 1110-1115出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2010.11.034
关键词
Denitrification; Mangrove; Methane; Nitrification; Nitrous oxide
资金
- Research Grants Council of the Hong Kong SAR [CityU160907]
The effects of wastewater on atmospheric fluxes of three greenhouse gases, nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2) from mangrove soils were investigated, and the differences among shrimp pond wastewater (SP), livestock wastewater (LS) and municipal (S) sewage were compared. The gas emissions from mangrove soils were significantly enhanced after wastewater irrigation and the highest emission of N2O and CO2 were obtained from SP. High N2O emission was also found in S treatment, where fluxes varied from 13.42 to 16.78 mu mol m(-2) h(-1), but the CH4 and CO2 fluxes were as low as the control irrigated with tap water. Results of soil analyses indicated that the high N2O emissions from mangrove soils receiving SP and S treatments were attributed to the denitrification and nitrification processes, respectively. The highest CH4 flux was recorded in LS treatment (186.14-762.40 mu mol m(-2) h(-1)), which also had the highest CO2 flux. The fluxes measured during the non-irrigation period were lower than those measured 4 h after irrigation. (C) 2010 Elsevier Ltd. All rights reserved.
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