Document Type : Research Paper
Authors
Abstract
Effect of probiotic, prebiotic and synbiotic in protein-deficient diets on performance and intestinal histomorphometry were investigated in a 2 × 4 factorial experiment. The treatments were arranged in two levels of protein (recommended and 10 percent less than requirements), and four types of additives (without additives, probiotics Gallipro, prebiotic Technomos and a mixture of them) in a completely randomized design with eight treatments and four replicates and 25 birds per each. Birds fed on low protein diet had more feed intake and feed conversion ratio (P<0.05). Feed conversion ratio of birds fed on additives (probiotics, Probiotic and synbiotic) diets was lower than of others (P<0.05). The Relative weight of cecea in birds fed on diets containing low protein was higher than of others (P<0.05). An increase in crypt depth of duodenum and a reduction in villi length in jejenum and villi length: crypt depth ratio in deudenum and jejenum were observed by feeding protein dificeint diets (P<0.05). Villi length in the duodenum of birds fed on additive-less diet were lower than of birds fed diets containing prebiotic or mixture of probiotic and prebiotic (P<0.05). Villi length: crypt depth ratio in jejenum of birds fed on diets containing recommended protein and mixture of probiotic and prebiotic were higher than of others (P<0.05). Villi length in ileum were increased by adding the mixture of probiotic and prebiotic to the diet (P<0.05). Villi thickness in the ileum of birds that were received synbiotic was lower than of birds that fed on diets containing prebiotics (P<0.05). It could be concluded that using of probiotic, prebiotic and their mixtre in protein deficient diets, improve the feed conversion ratio in Japanese quail by improving intestinal histomorphometric parameters.
Keywords
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