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KMID : 1025520120540010015
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Journal of Animal Science and Technology
2012 Volume.54 No. 1 p.15 ~ p.22
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Effect of Grain Sources on the Ruminal Methane Production in Hanwoo Steers
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Seol Yong-Joo
Kim Kyoung-Hoon
Baek Youl-Chang
Lee Sang-Cheol
Ok Ji-Woun
Lee Kang-Yeon
Choi Chang-Weon
Lee Sung-Sil
Oh Young-Kyoon
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Abstract
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This study was conducted to investigate the effects of grain sources on the ruminal methane production in Hanwoo steers. Six Hanwoo steers (BW = 614.4 ± 8.3 kg) were fed, on a DM basis (TDN 6.91 kg), 10% rice straw and 90% barley or corn based concentrate, respectively, according to Korean Feeding Standards (Hanwoo). Each period lasted 18 days including a 14-day adaptation and a 4-day measuring period. The steers were in the ventilated hood-type respiration chamber system (one cattle per chamber) during each measuring period to measure heat and methane production for 1 day. Nutrient intake and digestibility were not affected by steer fed grain sources. Methane concentration was not affected by steer fed either barley or corn-based concentrate, respectively (0.022% vs. 0.025%). Methane production was greater by steers fed corn than those fed barley (119.3 g/day vs. 139.4 g/day). This result indicated that methane emission factor by maintenance energy requirement for the late fattening Hanwoo fed corn was higher than the steers fed barley (43.6 kg/head/year) vs. corn (50.9 kg/head/year). Methane conversion rate (Ym) was 0.04 Ym and 0.05 Ym for barley and corn, respectively.
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KEYWORD
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Barley, Corn, Methane
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