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KMID : 1025520130550010051
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Journal of Animal Science and Technology
2013 Volume.55 No. 1 p.51 ~ p.59
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Effects of Brewers Grain, Soybean Curd and Rice Straw as an Ingredient of TMR on Growth Performance, Serum Parameters and Carcass Characteristics of Hanwoo Steers
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Chang Sun-Sik
Kwon Hyuk-Jin
Lee Sang-Min
Cho Young-Moo
Chung Ki-Yong
Choi Nag-Jin
Lee Sung-Sill
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Abstract
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This study was conducted to investigate the dietary effect of total mixed rations(TMR) containing brewers grain, soybean curd and rice straw, respectively, on growth performance and carcass characteristics of Hanwoo steers. Twenty four Hanwoo steers (average body weight 168 kg) in 6 months age were randomly allocated to 4 experimental groups, which contained 6 animals per group during 22-months feeding trial. The treatment was composed of the group fed concentrate and rice straw separately(T1), the group fed TMR containing brewers grain(T2), the group fed TMR containing soybean curd(T3) and the group fed TMR containing rice straw(T4). Body weight(BW) was not different among treatment groups during the growing and middle fattening period. However, it was significantly greater in T4 group than in T2 group on the final BW(p<0.05). Average daily gain was significantly greater in TMR groups compared to T1 group on the growing and late fattening(p<0.05). However, it was not different in total average. Dry matter intake tended to be increased in TMR groups. The feed conversion ratio was significantly lower in T4 group compare to T2 group(p<0.05). According to the yield traits, carcass weight of T1, T2, T3 and T4 were 389.0, 368.4, 387.5 and 384.3 kg, respectively. The back fat thickness, rib-eye area, and yield index were not different among the groups. Meat color, fat color, texture and maturity were not significantly different among groups. However, marbling score and appearance rate of meat quality grade of over 1+ were greater in T2 and T3 groups compare to other groups. Therefore, these results indicated that TMR with brewers grain and soybean curd may be ameliorated the growth performance and carcass characteristics of Hanwoo steers.
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KEYWORD
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Total mixed ration, Hanwoo steers, Growth performance, Carcass characteristics
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