Improving growth performance and economic return of Babary ducks by using autolysis yeast supplemented in the diet

Abstract

     Trend to using prebiotic replacement for antibiotic in livestock industry was enlarged. Many agro-industrials byproduct and coproduct were used to prebiotic function and expected their results to improve growth performance. The aim of this experiment was to evaluate growth performance of Babary ducks when supplemented autolysis yeast in the diet. Ninety-six Babary ducks averaging 59.03±5.86g body weight and 10d aging were used. The experimental design was completely randomized design. The animals were conducted into four group. For each group was four replicates with six ducks for replicate.  Treatments were control and supplemented autolysis yeast at 0.1, 0.2 and 0.3 percentage. The experiment lasted for 8 weeks with four periods including period 1 during 1–2 week, period 2 during 3-4 week, period 3 during 5-6 week and period during 7-8 week. The results showed that in during week 2 period supplementation of autolysis yeast at 0.1 percent tended to higher growth performance (p<0.10). However, when supply autolysis yeast up to 0.2 percent found that body weight and body weight gain were greater than control group similar the result in 5-6 weeks period. Additional autolysis yeast at 0.1 percent had higher growth performance and feed conversion ratio than control group. Moreover, Babary ducks received 0.1% autolysis yeast showed high salable bird return and net profit (p<0.05). It can be concluded that optimize level for supplementation autolysis yeast is 0.1 percentage resulted to great performance and economic return.