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Research Article Open Access
The aim of this study was to determine the influences of different growth promoters (prebiotic, probiotic, synbiotic and acidifier) for a period of 42 days on the growth and intestinal morphology of broiler chickens. A total of one hundred and sixty 1-d-old Ross 308 broiler chickens were randomly allocated into five dietary groups with four replicates. A corn-soybean-based diet was used as a basal diet. The dietary groups were 1- Control (basal diet), 2- basal diet plus prebiotic (1kg of ActiveMOS/ton) 3- basal diet plus probiotic (150,100,50gr of Protexin/ton of the starter, grower and final diets respectively) 4- basal diet plus synbiotic (1kg of Amax4x/ton) 5- basal diet plus acidifier (2 liter of Globacid/ton). Performance of broilers improved in experimental groups compared with control group at the end of the experiment. So that groups supplemented with prebiotic, synbiotic and acidifier had a significant (P<0.05) effect on broiler performance. whereas, probiotic group had not significant (P>0.05) effect on broiler performance. There was no difference (P>0.05) in the weight of internal organs between groups except spleen that increased significantly (P<0.05) in probiotic group compared with control group. Also, dietary groups influenced the histomorphological measurements of small intestine. Villus height, Crypt depth and Villus height to Crypt depth ratio were differed significantly (P<0.05) between experimental groups. So that synbiotic and acidifier groups had more effects on histomorphological parameters than other groups.
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Author(s): Behrouz Rezanezhad Dizaji Afshin Zakeri Amirhossein Golbazfarsad Saman Faramarzy and Orhan Ranjbari
Growth promoters, Small intestine, Broiler chicken