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Metabolizable Energy Requirement of Growing Hanwoo Bulls for Maintenance by Energy Equilibrium Metho

에너지 균형법에 의한 한우 수소의 유지 대사에너지 요구량

  • Lee, S. C. (National Livestock Research Institute, RDA) ;
  • Thak, T. Y. (National Livestock Research Institute, RDA) ;
  • Kim, K. H. (National Livestock Research Institute, RDA) ;
  • Yoon, S. G. (National Livestock Research Institute, RDA)
  • 이상철 (농촌진흥청 축산기술연구소) ;
  • 탁태영 (농촌진흥청 축산기술연구소) ;
  • 김경훈 (농촌진흥청 축산기술연구소) ;
  • 윤상기 (농촌진흥청 축산기술연구소)
  • Published : 2003.02.28

Abstract

Metabolizable energy requirements for maintenance (MEm) of Hanwoo bulls were estimated in twelves metabolism trials using three different feeds at four stages of body weight(100, 200, 300 and 400kg). Three feeds were composed of 1) concentrates and rice straw, 2) concentrates and mixed grass hay, 3) concentrates and corn silage, respectively. Three energy levels were 1) maintenance (M) requirement, 2) 1.5 ${\times}$ M, and 3) 2.0 ${\times}$ M. All bulls were received 60% of their energy from concentrates and 40% form roughages. Three cattle for each trials fed different energy level were housed in metabolism stalls during the 5days of collection period, a total collection of feces and urine. Thereafter, during the 2days of respiration period the heat production was measured by indirect calorimetry using respiratory chamber. MEm were 99.80, 94.48, 94.80, and 97.68 kcal/W0.75 at 100, 200, 300 and 400kg. Mean value of MEm and efficiency of utilization ME for retained energy(Kg) were 95.80 kcal/W0.75 and 0.44.

Keywords

Energy requirement;Energy balance;Hanwoo;MEm

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