Document Type : Research Paper

Authors

1 Phd student/ Urmia university

2 professor, Department of Animal Science, Faculty of Agriculture, University of Urmia‎

3 Associated professor, Department of Animal Science, Faculty of Agriculture, University of Urmia

Abstract

The aim of this experiment was to determine the total leucine requirement of male Ross 308 ‎broiler chicks. To determinate valine requirement of male broiler chicks based on growth ‎performance, a total of 250 male broiler chicks from 24 to 39 Days of age, was assigned to 5 ‎treatments with 5 replicate using a completely randomized design. Wheat-corn-soybean meal-‎based diet was formulated to provide the all nutrient except leucine, based on Ross 308 ‎management guide. Dietary leucine was supplied in 5 levels from 1.16 to 1.36 % for the ‎experimental period. In the experimental period weight gain, feed intake, feed conversion ‎ratio and feed efficiency ratio were determined. Result of this study showed that the liner ‎broken line model were used for determine of total leucine requirement for Ross 308 male ‎broiler chicks is the well fitted base on weight gain, feed intake and feed conversion ratio, and ‎evaluated leucine content for these performance parameters were 1.217, 1.218 and 1.213 % of ‎diet, respectively. The result of this experiment showed that the uric acid of chickens was ‎significantly affected by the Leucine supplementation in diet (P<0.01). The results indicated ‎that Leucine requirement for maximum performance of broiler chicks were tolerate between ‎‎1.213 to 1.218%, and the uric acid content is lowest in this limit.‎

Keywords

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