Prediction of enteric methane emission from beef cattle in Southeast Asia |
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| Authors: | Tomoyuki Suzuki Kritapon Sommart Wanna Angthong Thu Van Nguyen Anan Chaokaur Peerapot Nitipot Arun Phromloungsri Yimin Cai Takashi Sakai Takehiro Nishida Fuminori Terada Tomoyuki Kawashima |
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| Institution: | 1. Crop, Livestock and Environment Division, Japan International Research Center for Agricultural Sciences, Tsukuba, Ibaraki, Japan;2. Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, Thailand;3. Department of Livestock Development, Ruminants Feeding Standard Research and Development Center, Khon Kaen, Thailand;4. Department of Animal Sciences, Faculty of Agriculture & Applied Biology, Can Tho University, Can Tho, Vietnam;5. Faculty of Animal Sciences and Agricultural Technology, Silpakorn University, Phetchaburi, Thailand;6. Department of Animal Production Technology, Faculty of Agro‐Industrial Technology, Kalasin University, Kalasin, Thailand;7. Department of Animal and Grassland Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan;8. Division of Environmental Hygiene, Department of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan;9. Department of Animal Production Sciences, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan |
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| Abstract: | We conducted a meta‐data analysis to develop prediction equations to estimate enteric methane (CH4) emission from beef cattle in Southeast Asia. The dataset was obtained from 25 studies, which included 332 individual observations on nutrient intakes, digestibilities, and CH4 emissions. Cattle were provided tropical forage or rice straw, with or without concentrates in individual pens equipped with indirect open‐circuit head hood apparatus. The simplest and best equation to predict daily CH4 emission was CH4 (g/day) = 22.71 (±1.008) × dry matter intake (DMI, kg/day) + 8.91 (±10.896) R2 = 0.77; root mean square error (RMSE) = 19.363 g/day]. The best equation to predict CH4 energy as a proportion of gross energy intake (CH4‐E/GEI, J/100 J) was obtained using DMI per body weight (DMIBW, kg/100 kg), content (g/100 g DM) of ether extract (EE) and crude protein (CP), and DM digestibility (DMD, g/100 g); CH4‐E/GEI = ?0.782 (±0.2526) DMIBW ? 0.436 (±0.0548) EE ? 0.073 (±0.0218) CP + 0.049 (±0.0097) DMD + 8.654 (±0.6517) (R2 = 0.39; RMSE = 1.3479 J/100 J GEI). It was indicated that CH4 emissions from beef cattle in Southeast Asia are predictable using present developed models including simple indices. |
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| Keywords: |
Bos indicus
cattle enteric methane prediction equation |
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