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http://dx.doi.org/10.5187/JAST.2012.54.1.15

Effect of Grain Sources on the Ruminal Methane Production in Hanwoo Steers  

Seol, Yong-Joo (National Institute of Animal Science, RDA)
Kim, Kyoung-Hoon (National Institute of Animal Science, RDA)
Baek, Youl-Chang (National Institute of Animal Science, RDA)
Lee, Sang-Cheol (National Institute of Animal Science, RDA)
Ok, Ji-Woun (National Institute of Animal Science, RDA)
Lee, Kang-Yeon (National Institute of Animal Science, RDA)
Choi, Chang-Weon (Dept. of Animal Resources, Daegu University)
Lee, Sung-Sil (Department of Animal Science, Gyeongsang National University)
Oh, Young-Kyoon (National Institute of Animal Science, RDA)
Publication Information
Journal of Animal Science and Technology / v.54, no.1, 2012 , pp. 15-22 More about this Journal
Abstract
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 ${\pm}$ 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.
Keywords
Barley; Corn; Methane;
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