Effects of the different feeding types on growth performance, carcass characteristics, and meat composition of Holstein steers

초록

This study was conducted at a farm in hwacheon-gun, to evaluate the effects of different feeding types on growth performance, carcass characteristics, and meat composition of Holstein steers for seven months. Fifteen steers were randomly assigned to one of three dietary groups: T1 (concentrate feed + ryegrass straw), T2 (total mixed fermentation [TMF] + concentrate feed), and T3 (TMF). Average daily gain and dry matter intake were lower in T3 group than in T1 and T2 groups, but the differences were not significant. Concentrations of blood urea nitrogen in plasma were higher in T1 and T2 groups than in T3 group (p <0.05). Carcass weight, rib eye area, marbling score, and meat quality grade were slightly, but not significantly, higher in T2 group than in T1 and T3 groups. The amino acids composition and physicochemical characteristics in the sirloin were similar among the treatment groups. The content of eicosenoic acid in the sirloin was higher in T1 group than in T3 group (p < 0.05). Thus, the findings of this study indicate that a sequential feeding method using TMF and concentrate feed had some positive effect on carcass weight, rib eye area and marbling score without any negative effect on growth performance and meat composition of Holstein steers.

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