Effects of dietary inclusion of organic selenium at two levels 0.10 and 0.15 ppm along with Vit. E at two levels 50 ppm and 75 ppm on Growth, FCR, Feather score, dressing, weights of Thymus, Bursa and Spleen and various ages, Elisa titre levels of IBD and ND and Se concentration in liver and meat were studied. Growth and feather score triats were studied for males and females separately in 2 x 2 x 2 factorial experiment whereas other traits were studied sexes intermingled in 2 x 2 factorial experiment. Males were heavier than females at 42 days age (P<0.01). Females had better feather score at 28 days age but by 42 days, feather score of males was compared to that of females. Level of organic Se did not influence these traits. Higher Vit. E levels (75 ppm) resulted in higher body weight, better feather score and better FCR (P<0.01). Mortality was not noticed in any group during the course of the trial. Overall, a combination of Organic Se at 0.10 ppm and Vit. E at 75 ppm was found to give consistently superior results for growth traits, while a combination of Se at 0.15 ppm and Vitamin E at 75 ppm gave superior results for immunological traits.
Organic Selenium, Vitamin E, growth, carcass traits, broilers
