Performance of Vanaraja chicks fed diets containing different concentrations of protein at constant ratio with limiting amino acids

S.V. Rama Rao, A.K. Panda, M.V.L.N. Raju, G. Shyam Sunder, S.K. Bhanja and R.P. Sharma
Project Directorate on Poultry Rajendranagar, Hyderabad - 500 030
Email:[email protected]

A study was conducted to evaluate the effect of dietary protein level on performance of Vanaraja chicks during juvenile phase of life. Three hundred and sixty day-old straight run Vanaraja chicks were equally and randomly divided in to six groups of 10 replicates with six chicks in each replicate. Chicks in each of the 6 groups were fed with one of the six iso-caloric (2600 kcal ME/kg) diets containing 14.5 to 22.0% CP with an increment of 1.5 % from 3 to 49 days of age. The weight gain was significantly (P<0.05) depressed at 14.5% CP in diet compared to those fed higher levels (16% or more) of protein during 0 to 21 days of age. The similar trend was observed at 35 and 49 days of age. At 21 days of age, the efficiency of feed utilization was significantly (P<0.05) depressed as the dietary protein concentration decreased below 17.5%. No difference in the efficiency of feed utilization could, however, be found among the dietary groups containing 16 % protein and above during 0 to 35 days and 0 to 49 days of age. Neither ready to cook yield nor lymphoid organ (spleen and bursa) weights were influenced by the dietary protein concentration. The relative weights of liver, gizzard, giblet, intestine and fat were significantly higher in the birds fed diet containing 14.5 % CP as compared to those of other dietary groups (16 % CP and above). Based on the results of the study, it can be concluded that Vanaraja chicks need 16% CP (2600 kcal ME/kg) in the diet for optimum performance during 0 to 49 days of age.

Source : IPSACON-2005

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