Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Effects of high energy diet on growth performance, carcass characteristics, and blood constituents of final fattening Hanwoo steers

고에너지 사양이 비육후기 거세한우의 성장, 도체, 및 혈액성상에 미치는 영향

  • Chung, Ki Yong (Hanwoo Research Institute, National Institute of Animal Science, R. D. A.) ;
  • Chang, Sun Sik (Hanwoo Research Institute, National Institute of Animal Science, R. D. A.) ;
  • Lee, Eun Mi (Hanwoo Research Institute, National Institute of Animal Science, R. D. A.) ;
  • Kim, Hyun Ju (Hanwoo Research Institute, National Institute of Animal Science, R. D. A.) ;
  • Park, Bo Hye (Hanwoo Research Institute, National Institute of Animal Science, R. D. A.) ;
  • Kwon, Eung Gi (Hanwoo Research Institute, National Institute of Animal Science, R. D. A.)
  • 정기용 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 장선식 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 이은미 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 김현주 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 박보혜 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 권응기 (농촌진흥청 국립축산과학원 한우연구소)
  • Received : 2015.08.06
  • Accepted : 2015.09.15
  • Published : 2015.09.30
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Abstract

The aim of this study was to examine the effects of high energy diet on growth 26mon, 28mon, and 30mon in Hanwoo at different ages. High energy diet required not only an amount of concentrate on days of fattening periods but also induced cost for the management. We hypothesized that high energy diet was able to reduce a fattening period to reach a certain quality grade. A $2{\times}3$ factorial arrangement (High energy, control vs 26, 28, 30month endpoints) in a completely random design was used to feed 48 Hanwoo steers. Four steers were fed in same pen and 12 pens were used for treatment. Blood was drawn from each steers on every other months during early, middle, and final fattening periods. Over all ADG and feed efficiency were not different between high energy and control diet (P > 0.05). Dry matter intake was induced 30 mo-old early and final fattening periods at high energy diet. Serum glucose concentration were increased (P < 0.05) at 30 and 26month old steers. Marbling scores were greater at 30 month old than 26 and 28 month old Hanwoo steers. Carcass weight of Hanwoo steers were greater at 30 mon-old groups than other groups. These result indicated that high energy diet (+3% TDN) and slaughter endpoint collectively contribute to the observed quality grade compositional differences among three final fattening periods of Hanwoo steers.

본 연구는 한우 거세 비육우의 고에너지 사료급여에 따른 성장단계별 발육 및 혈액성상의 변화와 도축시기에 따른 도체특성을 구명하고자 수행하였다. 한우 거세우 48두를 2처리(고에너지 및 일반배합사료 급여)와 3개의 도축시기(26, 28, 30개월령)별로 처리 당 8두를 완전임의 배치하였다. 공시축 시험개시 시 체중은 평균 149.7 kg 이었고, 출하 시 체중은 633.5 kg(26개월), 673.5 kg(28개월), 그리고 734.5 kg(30개월)으로 나타났다. 체중은 비육기간이 길어질수록 증가하였고(P < 0.05), 건물사료 섭취량은 비육전기와 후기 모두 고에너지 사료급여구에서 높게 나타났다(P < 0.05). 혈액성분 분석에서는 비육후기 26개월령에서 포도당 농도가 가장 높게 나타났고, 혈중 중성지방의 농도 또한 비육후기 26개월령 출하 시험군에서 가장 높게 나타났다. 총 단백질의 농도는 28개월령 시험군에서 가장 낮게 나타났고 30개월령에 가장 높게 나타났다. 도체조사 결과 육량특성중 도체중은 30개월령 처리구에서 높게 나타났고(P < 0.05), 육질특성중 근내지방도, 육색, 및 성숙도는 30개월령에서 가장 높게 나타났다. 특히 고에너지 사료급여구에서 육질관련 특성이 높게 나타났다(P < 0.05). 이러한 결과는 한우 거세우의 사양기간동안 사료의 TDN가를 3%로 증가한 고에너지 사료를 급여함으로서 일반시험구와 비교하여 동일 육질등급에 도달하는 기간을 감소할 수 있다는 결과를 제시하였다.

Keywords

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