Effect of supplementing broiler diets with SAF-Mannan prebioticon intestinal microfloraand performance

Experiment was conducted to evaluate the effect of SAF-Mannan on productive performance and intestinal microflora by 180 day-old chicks. At six d، Chicks were divided to five groups (treatments) and each group was split into three replicates which included 12 birds. Amounts of 0. 3 mg/Kg lincomycin premix، 0 (control)، 0. 5 (A0. 5) and 1 (S1) g/Kg SAF-Mannan for total period were added to diet of the first four treatments and also 0. 25and 0. 75 g/Kg SAF-Mannan for starter and grower، respectively were added to diets of the fifth treatment (S0. 25-0. 75). Poupulation of E. coli and lactobacillus of ileal samples were assayed at 18، 28 and 38 d of age. The results showed that birds fed on SAF-Manan diets had lower feed conversion ratio compared to control group (P<0. 05). At 18 and 28 d، the E. coli count in the al content of SAF-Manan treatments was lower than controland lincomycin treatment (P<0. 05). At 28 d، lactobacillus count in ileal content of birds fed on dietd containing 1 g SAF-Manan was higher compared to other treatments (P<0. 05). It could be conclude that addition of 0. 5 g/Kg SAF-Manan to broiler diet improve weight gain and feed conversion ratio probably، by modifying of intestinal microflora.