Emissions of nitrous oxide (N2O) and methane (CH4) from poultry enteric fermentation were investigated using a respiration chamber. Birds were placed in a respiration chamber for certain intervals during their growing period or for the whole life cycle. The accumulated gas inside the chamber was sampled and analyzed for N2O and CH4 production. A curve for gas production during a life cycle was fitted. The calculated area under the curve estimated the emission factor of poultry enteric fermentation on a life cycle basis (mg bird-1 life cycle -1). This method can be used to estimate CH4 or N 2O emissions from different types of avian species taking into account factors such as diet, season or thermal effects. The CH 4/N2O emission factors estimated for commercial broiler chickens, Taiwan country chickens and White Roman Geese were 15.87/0.03, 84.8/16.4 and 1,500/49 (mg bird-1 life cycle-1), respectively, while the calculated CH4/N2O emission from enteric fermentations were 3.03/0.006, 14.73/2.84 and 9.5/0.31 (Mg year -1), respectively in Taiwan in the year of 2000. The described method is applicable to most poultry species and the reported emission factors were applicable to meat type poultry only.
CITATION STYLE
Wang, S. Y., & Huang, D. J. (2005). Assessment of greenhouse gas emissions from poultry enteric fermentation. Asian-Australasian Journal of Animal Sciences, 18(6), 873–878. https://doi.org/10.5713/ajas.2005.873
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