Effect of wastewater discharge on greenhouse gas fluxes from mangrove soils
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 umol 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 祄ol m-2 h-1), which also had the highest CO2 flux. The fluxes measured during the non-irrigation period were lower than those measured four hours after irrigation.
Denitrification mangrove methane nitrification nitrous oxide
G.C. Chen N.F.Y. Tarn Y.S. Wong Y. Ye
Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China Third Instit Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China Department of Biology, Hong Kong University of Science and Technology, Hong Kong SAR, China State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, Fujian, China
国内会议
厦门
英文
57-66
2011-04-01（万方平台首次上网日期，不代表论文的发表时间）