Effect of Finishing Diets on Growth Performance and Carcass Characteristics of Culled Dairy Cows
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This study was aimed to evaluate an effect of fattening diet on growth performance and carcass quality of culled dairy cows. Culled cows (N = 32) were kept individualy and alloted to one of the four treatments. The control group (T0) was slaughtered immediately after culling-off. The other 3 groups were fed with ad lib corn silage (T1), 6 kg. cassava pulp + ad-lib corn silage (T2) and 6 kg. rough rice bran + ad-lib corn silage (T3). Cows fed with corn silage had the lowest average daily feed intake (10.64 vs.11.21 and 12.11 kg DM/d; P = 0.001), the highest feed : gain ratio (27.79 vs. 21.65 and 25.67; P = 0.087)) and tended to have the lowest ADG (0.38 vs. 0.51 and 0.51 kg/h/d) respectively. No treatment effect was found on average carcass percentage, carcass length, lean percentage, carcass fat percentage, bone percentage, loin eye area and KPH percentage among groups. However, the cassava group (T2) had the highest intramuscular fat (P = 0.006).
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