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 Hanwoo steers distributed by estimated breeding value for meat quality

고에너지 사양이 육종가 배치별 거세한우의 성장, 도체, 및 혈액성상에 미치는 영향

  • Chung, Ki-Yong (Hanwoo Research Institute, National Institute of Animal Science, R.D.A.) ;
  • Lee, Sung- Hwan (Chung Nam National University, Animal Sciences) ;
  • 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-Joo (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-Ki (Hanwoo Research Institute, National Institute of Animal Science, R.D.A.)
  • 정기용 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 이승환 (충남대학교 동물자원학과) ;
  • 장선식 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 이은미 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 김현주 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 박보혜 (농촌진흥청 국립축산과학원 한우연구소) ;
  • 권응기 (농촌진흥청 국립축산과학원 한우연구소)
  • Received : 2015.08.21
  • Accepted : 2015.09.15
  • Published : 2015.12.31
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Abstract

This study was to investigate the effect of high energy diet on characteristics of Hanwoo steers distributed by estimated breeding value (EBV). The aim of this experiment was to determine the effect of high energy diet on the high and low beef group distributed by EBV for quality grades. We hypothesized that high energy diet is able to increase quality traits in high EBV groups when fed a high energy diet. A $2{\times}2$ factorial arrangement (High energy, control vs high EBV, low EBV) in a completely random design was used to feed 26 Hanwoo steers. Blood was drawn from each steers from 11 to 28 months. ADG and feed efficiency were not different between high energy and control diet (P>0.05). The level of DMI was greater at calf and early fattening diet in low EBV groups (P<0.05). Serum glucose and tryglyceride conecntrations were increased (P<0.05) by high EBV group from 22 to 28 month old. Serum NEFA concentration were plateau at 24 months at high EBV group and steady reduced by high energy diet (P<0.05). This data indicated that high energy diets increased serum glucose and triglyceride concentrations of high EBV steers at final fattening period.

본 연구는 육종가를 이용하여 배치한 거세한우에 고에너지 사료를 급여하여 성장, 도체성적 및 혈액성분의 변화에 대하여 분석을 해보았다. 육종가의 적용은 소고기 고급육이 가능한 개체를 선발하는 방법으로 사용되어져 왔다. 본 연구는 육종가에 의해 고, 저로 나누어진 한우그룹에 고에너지 사료를 급여효과를 알아보기 위해 수행되었다. 고육종가 그룹에서 고에너지 사료를 급여할 경우 도체성적이 높아진다는 가정을 하였다. 연구를 수행하기 위해 26마리의 거세한우를 이용하여 $2{\times}2$ 완전임의배치를 하였다(고에너지, 일반사양 과 고육종가, 저육종가로 배치). 체중, 일당증체량, 건물섭취량, 사료요구율의 결과로 고 육종가 그룹에서 수치적으로 높게 나타났다. 혈청성분분석 결과로 비육후기(20 - 27개월령)의 혈청성분중 포도당과 중성지방 농도가 고육종가 그룹에서 유의적으로 높게 나타났고 이는 도체성적에도 긍정적인 효과를 가져오는 것으로 나타났다. 하지만 선행연구에서 나타났던 혈중 알부민과 인의 성분은 도체등급에 영향을 미치지 않는 것으로 보인다. 도체중 분석에서는 근내지방도가 고육종가 그룹이 수치적으로 높게 나타났으나 유의적인 차이는 없었다. 본 연구의 결과로 특정 혈중대사 성분들 중 포도당과 중성지방과 같은 지방대사에 관여하는 성분들은 비육후기 육종가가 높을수록 높은 농도로 나타났고 이는 혈중 대사성분이 유전적인 영향에 의해서 변화가 된다는 것을 알 수 있었다.

Keywords

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