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Effects of Melengesterol Acetate, Selenium and Vitamin E Supplemental Feeding on Growth, Carcass and Longissimus Dorsi Muscle Traits in Hanwoo Cull Cows

한우 노산암소에 대한 발정억제제 및 항산화제의 급여가 증체와 도체성적에 미치는 영향

  • 정준 (농협중앙회 축산연구소) ;
  • 이성수 (농협중앙회 가축개량사업소) ;
  • 박노형 (농협중앙회 축산연구소) ;
  • 성낙일 (농협중앙회 축산연구소) ;
  • 장윤호 (농협중앙회 축산연구소) ;
  • 최성호 (충북대학교 축산학과) ;
  • 송만강 (충북대학교 축산학과) ;
  • 서형기 (농협중앙회 축산연구소) ;
  • 이명일 (농협중앙회 축산연구소)
  • Published : 2006.04.30

Abstract

Twenty four Hanwoo cull cows were assigned to 2 groups, control and melengerol acetate(MGA)+selenium supplement containing vitamin E(SeE), based on the parity(6.5±1.7 birth) and body weight (493.17±55.61kg), and the experiment was conducted to establish the reasonable fattening method of cull cows for 240 days. Average daily body gains during 240 days were 0.51kg and 0.63kg in control and MGA+SeE, respectively(P<0.10). DDMI/ADG of MGA+SeE group improved compared to control group(P<0.05). Therefore, supplementation of MGA+SeE in concentrates may accelerate both of the growth rate and feed efficiency in Hanwoo cull cows. MQI from MGA+SeE was more developed based on the larger rib-eye area and thinner backfat thickness in carcass than that from control. Marbling score for MGA+SeE tended to increase compared to control. Dietary Se supplementation significantly affected muscle Se concentration in longissimus dorsi meat of MGA+SeE group(P<0.05). Similar results to Se were obtained from α-Tocoperol concentration. During 7 days of simulated retail display, accumulations of thiobarbituric acid reactive substances(TBARS) concentration in beef was greater(P<0.05) in control than in supplemented cows. These results supported the hypothesis that supplementation of MGA+SeE improve the growth performance and carcass grade both by the growth stimulating effect of MGA+SeE and by preventing the oxidation of the longissimus dorsi muscle in Hanwoo cull cows.

Keywords

Hanwoo cow;MGA;Selenium;Vitamin E;Growth;Carcass

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