Impact of Protein and Certain Amino Acids Levels on Performance of Growing Japanese Quails

A 2×2×2 factorial design experiment was carried out with two levels of protein (20 and 22%), two levels of lysine (1.05 and 1.15%) and two levels of total sulfur amino acids (TSAA) (0.8 and 0.9%) to investigate their effect on growth performance and carcass characteristics of growing Japanese quail. A total number of 408 unsexed one week old Japanese quail chicks were randomly distributed into eight treatment groups of 51 chicks each with three replicates (each of 17 chicks). Live body weight at 21 and 42 days and feed intake during 21-42 days of age was significantly affected (P<0.05) by the interaction among protein, lysine and TSAA in growing Japanese quail diets. Effect of protein, lysine and TSAA or their interactions did not significantly (P>0.05) influences carcass traits. The results of economical efficiency indicated that the best economical efficiency was recorded by quail chicks fed 20% crude protein with 1.05% lysine and 0.8% TSAA up to 42 days of age.