1Animal Nutrition and Clinical Nutrition Department, Faculty of Veterinary Medicine, Alexandria University, Egypt.
2Animal Nutrition and Clinical Nutrition Department, Faculty of Veterinary Medicine, Al-Zagazig University, Egypt.
3General Authority of Veterinary Service, Egypt.
This experiment was conducted to study the effect of dietary n-3 to n-6 ratio on performance, immune response, blood parameters and fatty acids profile of broiler chickens. A total number of 192 one day old broiler chicks were randomly alloctted into 6 groups. Chicks of groups 1, 2, 3, 4, 5 and 6 were fed balanced corn-soybean diets containing n-3 to n-6 ratios of 1:1, 1:3, 1:5, 1:7, 1:9 and 1:11, respectively. Different n-3 to n-6 ratioes had no significant effect on growth performance parameters. The best dressing percentage was recorded in group 3 while no significant difference was noticed in the weight of organs except for a significant increase in the weight of gizzard in group 4. There was a variable effect of the n-3 to n-6 ratio on parameters of innate immunity. The highest lymphocyte percentage was detected in group 5. Antibody titers against Newcastle disease (ND) and Avian Influenza (AI) increased in wider ratio groups. The lowest glucose level was detected in group 4. Though serum albumin and total protein were decreased in group 3, serum globulin increased in groups 2 and 3. The lowest cholesterol content of breast meat was detected in group 3 and the highest content was detected in group 6. The cholesterol content of the thigh recorded opposite results. Narrow dietary n-3 to n-6 groups tended to record higher n-3 PUFAs content especially DHA in breast meat. While wider n-3 to n-6 ratio groups tended to deposit more SFAS, MUFAs and n-6 PUFAs than the narrower ratio groups. The best n-3 to n-6 ratio of breast meat was recorded in group 2 receiving dietary n-3 to n-6 ratio of 1:3. From the results of this study, it could be concluded that the dietary n-3 to n-6 ratio had no significant effect on growth performance of broiler chickens. The best dressing percentage was detected in group with the ratio of 1:5. The ratio of 1:3 recorded the best health state parameters.
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Please cite this article as: El-Katcha MI, El-Kholy ME, Soltan MA & EL-Gayar AH. 2014. Effect of dietary omega-3 to omega-6 ratio on growth performance, immune response, carcass traits and meat fatty acids profile of broiler chickens. Poult. Sci. J. 2 (2): 71-94.