EFFECT OF USING LOCALLY PROBIOTIC AND ZINC-BACITRACIN AS GROWTH PROMOTERS ON BROILER PERFORMANCE

A.T.D.AL-Tememi,; Abdul-abass And A.A.K.Alyassin, M.H.

	EFFECT OF USING LOCALLY PROBIOTIC AND ZINC-BACITRACIN AS GROWTH PROMOTERS ON BROILER PERFORMANCE
iraqi poultry sciences journal
Article 1, Volume 3, Issue 1, 2008, Pages 8-24
Authors
; M.H. Abdul-abass and A.A.K.Alyassin
Abstract
The objective of this experiment was to investigate the effect of supplementing different levels of locally probiotic and antibiotic to rations on the performance of broilers. Five hundred and twenty five one day old fawbro unsexed broiler chicks were used. The birds were randomly distributed to seven treatment – groups with three replicates per treatment (25 chicks per replicate). The treatments groups were as follows: Control ( T0) without any addition .Treatments 1, 2 and 3 (T1 ,T2 and T3) adding 2.5, 5 and 7.5 Kg of locally probiotic / ton feed respectively. Treatments 4, 5 and 6 (T4, T5 and T6) adding 150, 300 and 450 gm of zinc bacitracin / ton feed respectively. The result indicated that adding 2.5 to 7.5 Kg locally probiotic / ton feed significantly (P<0.05) improved live body weight, weight gain, feed: gain ratio, at 8 weeks of age, on the contrary, birds fed diets contained (150 to 450 gm zinc bacitracin / ton feed) had significantly (P<0.05) low body weight, and low acumulative weight gain and reduction in feed: gain ratio and high mortality rate at 8 weeks of age. T1 showed optimal performance as compaired with birds in T2 and T3, while, T5 showed lower performance. It can concluded that locally probiotics is more benefit than zinc bacitracin as growth promoter in broiler rations.

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