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Effect of L-Threonine Supplementation in Diets on Immune Response and Carcass Traits in Broiler Chickens

M. M. Khan K. K. Khose S. J. Manwar M. A. Gole S. Sajid Ali M. F. Siddiqui
Vol 8(7), 335-341
DOI- http://dx.doi.org/10.5455/ijlr.20171031090856

Three hundred straight-run ‘Cobb 400’ day-old broiler chicks were randomly distributed into five treatment groups having three replicates containing 20 chicks in each and reared up to 6 weeks of age. The dietary treatment groups were the threonine deficient diet-Negative Control (A), Control diet containing threonine level as per NRC (B), diet containing L- threonine 10% (C), 20% (D), 30% (E) above NRC, (1994) recommendation. At the end of 3rd week, antibody titres against New Castle Disease (ND) were significantly (P<0.05) higher in treatment group C as compared to other treatment groups, whereas, there was non-significant difference in 6th week of age. At the end of 3rd and 6th week of age the Infectious Bursal Disease (IBD) antibody titers were numerically higher in L-threonine supplemented groups but, differences were non-significant among all treatment groups. The edible carcass yield was slightly higher in l-threonine supplemented groups. The abdominal fat percentage in L-threonine supplemented group C at 10% above NRC level was numerically lower than control and other treatment groups. The results of the present trial suggested that the dietary supplementation of L-threonine at 10% above NRC were found to be beneficial in term of improved immune response and carcass traits in broiler chickens.

Keywords : Broiler Chickens Carcass Traits Diets Immune Response L-Threonine

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