Influence dietary supplementation of guanidino acetic acid on performance and carcass traits ofmale and female broiler chicks

The current study investigated the effect of the Guanidino acetate instead of creatine capacity of muscles in the male and female broiler chicks performance for total 1120 pieces of sexed Ross 308 broilers in block completely random design method with 4 treatments and 4 repeats. The treatments are 1- male chick without GAA supplement diet 2- male chick with GAA supplement diet 3- female chick without GAA supplement diet 4- female chicks with GAA supplement diet. Finally the feed intake, weight gain and feed conversion rate was measured periodically with in periods of (0 to 10), (11 to 24) and (25 to 42) days old. In the age of 42 day old, 3 pieces was selected from each pen, and was analyzed. Characteristics investigated was carcass percent, breast and femur meat, ventral fat, back, small intestine, liver, gizzard, heart, spleen and bursa weight. For Weight gain had effect in ages 11 to 24, 25 to 42 and in total period (p<0.05) that in male chicks is better than females. and in ages 11 to 24 and in total period Adding GAA had effect (p<0.05) that WG in diets without supplement is higher than other diets. For Feed intake had effect in 11 to 24 and 25 to 42 and in total period (p<0.05) that in male chicks is better than female chicks, and also except age (0 to 10), using GAA had significant effect in other ages (p<0.05) and with GAA, chicks had less feed intake. in FCR, for male chicks in total period it had a significant effect (p<0.05) and it was better than femal chicks. Adding GAA in (11 to 24 and for 24 to 42) ages had less FCR. For carcass traits, it just had a effect on heart percentage and in males was higher than females and with using GAA it was high.