Effects of dietary supplementation with rice bran oil on the growth performance, blood parameters, and immune response of broiler chickens
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Background: The objective of this experiment was to investigate the effects of dietary supplementation of rice bran oil (RBO) on growth performance, blood parameter, and immune response in broiler chickens. Methods: A total of 240 1-d-old ROSS 308 male broilers were randomly allotted to 4 dietary treatments with six replicated pens consisting of ten chicks. The basal diet was formulated to be adequate in energy and nutrients. Three additional diets were prepared by adding 5, 10 or 20 g/kg of RBO to the basal diet. The experimental diets were fed on an ad libitum basis to the birds during 35 d. Results: Results indicated that increasing inclusion level of RBO in diets improved BW gain (linear and quadratic, P < 0.01), improve feed conversion ratio (linear, P < 0.05) of birds during 0 to 35 d. There was no effect of inclusion level of RBO in diets on feed intake of birds. There was no effect of inclusion level of RBO in diets on erythrocytes of birds. However, heterophil, lymphocyte, and monocytes increased (linear and quadratic, P < 0.01) with inclusion level of RBO in diets increased. Feeding the diets containing increasing amount of RBO to birds increased (linear, P < 0.01) the concentrations of total cholesterol. Increasing inclusion level of RBO in diets increased concentrations of IgG (linear, P < 0.01). There was no effect of inclusion level of RBO in diets on concentrations of IgM. Conclusions: These results suggest that dietary RBO may be used functional ingredient to improve growth performance, total cholesterol in serum, and immune response of birds.
Abstract
Background: The objective of this experiment was to investigate the effects of dietary supplementation of rice bran oil (RBO) on growth performance, blood parameter, and immune response in broiler chickens. Methods: A total of 240 1-d-old ROSS 308 male broilers were randomly allotted to 4 dietary treatments with six replicated pens consisting of ten chicks. The basal diet was formulated to be adequate in energy and nutrients. Three additional diets were prepared by adding 5, 10 or 20 g/kg of RBO to the basal diet. The experimental diets were fed on an ad libitum basis to the birds during 35 d. Results: Results indicated that increasing inclusion level of RBO in diets improved BW gain (linear and quadratic, P < 0.01), improve feed conversion ratio (linear, P < 0.05) of birds during 0 to 35 d. There was no effect of inclusion level of RBO in diets on feed intake of birds. There was no effect of inclusion level of RBO in diets on erythrocytes of birds. However, heterophil, lymphocyte, and monocytes increased (linear and quadratic, P < 0.01) with inclusion level of RBO in diets increased. Feeding the diets containing increasing amount of RBO to birds increased (linear, P < 0.01) the concentrations of total cholesterol. Increasing inclusion level of RBO in diets increased concentrations of IgG (linear, P < 0.01). There was no effect of inclusion level of RBO in diets on concentrations of IgM. Conclusions: These results suggest that dietary RBO may be used functional ingredient to improve growth performance, total cholesterol in serum, and immune response of birds.
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