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Effects of Dietary Type During Late Fattening Phase on the Growth Performance, Blood Characteristics and Carcass Traits in Hanwoo Steers

한우 거세우의 비육후기 사료 형태에 따른 사양성적, 도체특성 및 혈액성분 변화

  • Cho, Woong Gi (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Lee, Shin Ja (Department of Animal Science & Biotechnology, Gyeongsang National University) ;
  • Ko, Young Hyun (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Chang, In Surk (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Lee, Sung Sill (Department of Animal Science & Biotechnology, Gyeongsang National University) ;
  • Moon, Yea Hwang (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology)
  • 조웅기 (경남과학기술대학교 동물생명과학과) ;
  • 이신자 (경상대학교 동물생명과학과) ;
  • 고영현 (경남과학기술대학교 동물생명과학과) ;
  • 장인석 (경남과학기술대학교 동물생명과학과) ;
  • 이성실 (경상대학교 동물생명과학과) ;
  • 문여황 (경남과학기술대학교 동물생명과학과)
  • Received : 2013.05.14
  • Accepted : 2013.09.25
  • Published : 2013.10.31

Abstract

To develop a diet for Hanwoo steers during the late fattening phase, three different feeding treatments were investigated: a group fed concentrate and rice straw separately (Formula feed), a group fed TMR during the whole late fattening period (TMR), and a group fed TMR plus concentrate (Formula-TMR). Thirty Hanwoo steers 20 months of age (average body weight = 445 kg) were allotted by a completely randomized design into three treatment groups (ten steers in each group). The impact of these treatments on the performance, carcass traits, and blood composition related to body fat synthesis was assessed. The average dry matter and TDN intake were greater in Formula-TMR compared to other treatments (p<0.05); however, body gain, carcass weight, meat production index, and fat color were not affected by dietary type. Blood characteristics, such as concentrations of retinol, insulin, and leptin were not affected by any of the treatments; however the marbling score of the longisimus muscle was significantly higher in Formula-TMR (p<0.05), which was relatively high in blood leptin concentration. The muscle texture, meat quantity index, and meat quality index were highest in the Formula feed, TMR, and Formula-TMR, respectively (p<0.05).

Keywords

Dietary type;Hanwoo steers;Late fattening feed;Carcass traits;Blood composition

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