اثر تغذيه سطوح مختلف پروبيوتيك تجاري ايمونوباك بر عملكرد جوجه هاي گوشتي

The effect of feeding different levels of immunobac probiotic on the performance of broilers

Probiotic on the performance of 500 mixed-sex broilers. The experiment consisted of four dietary treatments and five replicates per treatment with 25 broiler chicks per replicate in a complete randomized design. Four dietary treatments were 1) basal diet containing no probiotic; 2) basal diet+ 80% of the recommended level of immunobac probiotic; 3) basal diet+ the recommended level of immunobac probiotic and 4) basal diet+ 120% of the recommended level of immunobac probiotic. The amount of the probiotic in the diets during 1-10 and 16-25 days were 4, 5 and 6 mg/chick/day in diet 2, 3 and 4, respectively. The corresponding values in these diets during 31-45 days were 8, 10 and 12 mg/chick/day. In this experiment immunobac probiotic was removed from the diets during the days 11-15, 26-30 and 41-45. The results showed that feed conversion was significantly (p<0.05) better with the diets containing immunobac than control in whole production period (1-45 days). Weight gain, feed intake, mortality rate, carcass yield, abdominal fat, litter pH and litter moisture showed no significant difference among groups when whole production period (45 days) was considered.