Effects of ideal ratios of digestible Arg:Lys with or without guanidino acetic acid on growth performance and carcase traits of turkey poults

A total of 480 one-day-old male turkey (B.U.T.6) were assigned to eight treatments with six replicates and 10 birds in each replicate in a 4x2 factorial arrangement. Treatment groups were four ideal ratios of digestible Arg to Lys (85, 95, 105, and 115%) and two levels of CreAmino (0 and 0.06%) as a guanidino acetic acid (GAA) source. Body weight gains (BWG), feed conversion ratio (FCR) and feed intake (FI) were measured during two periods of starter (0-21d) and grower (22-49d). At the end of experiment (49 d) two birds per replicate were selected and slanghtered and their carcass traits were measured. The main effect of Arg:Lys on BWG was significant during starter period (P