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Local emission factors estimates for methane emission from cattle enteric fermentation using IPCC tier-2 methodology

Azizi, A.A.*¹, Mardhati, M.¹, Mohd Fairuz, M.S.², Shaidatul Azdawiyah, A.T.², Nurul Ain, A.B.², Fauzi, J.², Mohamad Hariz, A.R.² and Reisinger³, A.

¹Animal Science Research Center,
²Biodiversity and Environment Research Center, Malaysian Agricultural Research and Development Institute (MARDI), Serdang, Selangor,
³New Zealand Agricultural Greenhouse Gas Research Center, Wellington, New Zealand

Malaysian J. Anim. Sci. 2017 20(2): 1-10

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Understanding the magnitude of consequences of climate change caused by greenhouse gases (GHG) emissions largely relies on GHG inventory stocktaking and emission estimates that aggregate activity data and emission factors (EF). For that matter, a specific EF to calculate methane (CH4) emission from mature beef cattle enteric fermentation has been devised using IPCC Tier-2 methodology for breeding cows and breeding bulls based on local production parameters, which in this case, from local beef breed of Brakmas cattle. EF generated for breeding cows and breeding bulls were 51.6 and 65.7 kg CH4/animal/year, respectively. The values are higher than the default IPCC value of 47 kg CH4/animal/year for similar region. Average value for the generated EF, which was 58.65 kg CH4/animal/year, with an uncertainty range of �30% was used in the calculation of emission using IPCC Tier-1 methodology. The use of this value resulted in 24.8% higher estimates than when using the default IPCC EF. This EF value is suggested for use in emission estimates for the national GHG inventory reporting.