Growth and meat production of SBT and STB commercial crossbred duck
Experiment was completely randomized designed with 5 plots including BT, TB, SBT, STB, S at Dai Xuyen Duck Breeding and Research Center. The each of plot was 100 duck at 1 day age (50 male, 50 female) to evaluate the growth rate and meat production of SBT and STB commercial crossbred ducks then find out the time for crossbred duck slaughter. The results show that the survival rate of SBT and STB commercial crossbred ducks was over 99% and 98% respectively. The body weight of SBT, STB duck at 8 weeks of age was 2480g and 2532.3g respectively; which was 2746.3g and 2789g respectively at 10 weeks of age with the heterosis for body weight gain was 0.41% and 0.37%. The feed consumption at 8 and 10 weeks of age was 2.30 and 2.69 kg/body weight gain, respectively. The slaughter at 8, 9 and 10 weeks of age the dressing percentage’ crossbred SBT and STB ducks were high from 69.55 % to 71.91%; the breast percentage was from 17.03% to 18.54%; the leg percentage was from 10.56% to 13.20% with the belly fat percentage was low only from 0.8% to 1.67%. The breast meat rate’ crossbred ducks at 8 and 10 weeks of age was improved compared to the breast meat rate’15-Dai Xuyen Sea duck with 2.18-2.39% and 1.65-1.76% respectively. The economic efficiency of appropriate time for crossbred duck slaughter at 8 weeks age was high.
