Abstract

본 연구는 맥주박, 비지박 및 볏짚을 각각 이용하여 배합한 TMR을 한우 거세우에게 급여하였을 때 사양성적, 혈액성상 및 도체특성을 구명하고자 수행되었다. 시험구는 6개월령 한우 거세우 24두(평균체중 168 kg)를 배합사료 볏짚 분리급여구(T1), 맥주박 첨가 TMR 급여구(T2), 비지박 첨가 TMR 급여구(T3) 및 볏짚 첨가 TMR 급여구(T4)에 각각 6두씩 완전임의 배치하여 총 22개월간 사양시험을 실시하여 28개월령에 도축하였다. 시험결과에서 체중은 육성기에서 비육전기까지 처리구들간 유의적인 차이는 없었다. 하지만, 종료시 체중에서 T4 처리구가 T2 처리구에 비해 유의적으로 높았다. 일당증체량은 육성기 및 비육중기에서 TMR 급여구가 T1에 비해 유의적으로 높았지만(p<0.05), 전체평균에서는 차이가 없었다. 건물섭취량은 TMR 급여구(T2, T3, T4)에서 높은 경향을 나타내었다. 사료요구율은 T2 처리구에 비해 T4 처리구가 유의적으로 낮았다(p<0.05). 육량특성에서 도체중은 T1, T2, T3 및 T4 처리구에서 각각 389.0, 368.4 387.5 및 384.3 kg이었다. 등지방두께, 등심단면적 및 육량지수는 처리구들간 유의적 차이는 없었다. 육질특성에서 육색, 지방색, 조직감 및 성숙도에서는 처리 구간 유의적인 차이가 있었으나, 근내지방도와 육질 <TEX>$1^+$</TEX> 등급 이상 출현율에서는 T2와 T3 처리구가 다른 처리구에 비해 높았다. 따라서 본 연구의 결과 맥주박과 비지박을 이용한 TMR 사료는 한우 거세우의 발육 및 도체특성에 있어 적절한 것으로 나타났다. 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 <TEX>$1^+$</TEX> 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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