Determination of Dietary Leucine Amino Acid Requirement for Ross 308Male Broiler ‎Chicks in Finisher Period

The aim of this experiment was to determine the total leucine requirement of male Ross 308 ýbroiler chicks. To determinate valine requirement of male broiler chicks based on growth ýperformance, a total of 250 male broiler chicks from 24 to 39 Days of age, was assigned to 5 ýtreatments with 5 replicate using a completely randomized design. Wheat-corn-soybean meal-ýbased diet was formulated to provide the all nutrient except leucine, based on Ross 308 ýmanagement guide. Dietary leucine was supplied in 5 levels from 1.16 to 1.36 % for the ýexperimental period. In the experimental period weight gain, feed intake, feed conversion ýratio and feed efficiency ratio were determined. Result of this study showed that the liner ýbroken line model were used for determine of total leucine requirement for Ross 308 male ýbroiler chicks is the well fitted base on weight gain, feed intake and feed conversion ratio, and ýevaluated leucine content for these performance parameters were 1.217, 1.218 and 1.213 % of ýdiet, respectively. The result of this experiment showed that the uric acid of chickens was ýsignificantly affected by the Leucine supplementation in diet (P