Effect of diet physical form, barley variety and enzyme supplementation on growth performance, carcass characteristics and immune response of broiler chickens

Document Type : Research Paper

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Abstract

A 3*2*2 factorial experiment with a completely randomized design in 12 treatments, 3 replicates and 27 chickens in each replicates was conducted to evaluate the effects of physical form, barley variety and enzyme addition on growth performance; carcass characteristics and immune system response of broiler chickens with use of 927 one day of old Ross 308 broiler chickens. .Main effects and levels of Factors were barley varity (Fajr, Reyhaneh, and Yosef), diet form (mash or pellet) and enzyme level (0 and 0/05 g/kg dry matter).Results showed that feed intake and growth rate are affected by main effects and interaction effects over the entire raising period (P < 0.05). Main effects (Even though, variety) and interaction effects, affect production efficiency index (PEI). Pelleting of diets and utilizing enzyme significantly improved yield, increased abdominal fat and decreased relative weight of liver and gall (P < 0.05). antibody titers in response to sheep red blood cells (SRBC) and IgM no affected by main and interaction effects (P>0.05) but increased levels of IgG with the addition of enzymes to the diet(P <0/05). According to this result, the use of pellet diet containing Ryhaneh variety with enzyme recommended in poultry nutrition.

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Animal Sciences Journal
Volume 30, Issue 114
June 2017
Pages 257-272

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