Utilization of A Probiotic "Starbio" in Broiler Diet With Differrent Levels of Crude Fibre

Abstract

Previous study showed that a probiotic "starbio" were more effective to improve
the productivity and feed efliciency broilers if the protein content of the diet was reduced 2 % as compared with broiler commercial ration. This may be due to ability of tlle microbe itself in probiotic "starbio" to synthesize protein and other nutrients. The aim of this study was to investigate t.he effect of probiotic in diet with different levels of crude fibre on the broiler performance. Onehundred and eighty day old broiler chickens were used in this study up to six weeks of experiment. The Treatments were factorial of levels of crude fibre in diets (4.5 , 6 and 8%) and levels of probiotic "starbio" (0 and 0.25%) with five replication of six birds. The ration were fomulated iso—nitrogeneously and iso-caloricly (19 % CP, 3000 kcal ME/kg of starter diets and 17 % CP, 3100 kcal ME/kg of finisher diets). The data obtained were subjected to analysis of variance based on 3 x 2 factorial Completely Randomized Design. Differences between treatment means were
examined using the Least Significant Difference (LSD) test. Results of this study showed that the addition of probiotic in the diet with 6 % crude fibre content gave the highest (1814 gram/head) body weight gain and the best (1,77) feed conversion ratio (P < 0.05) compared with other diets.