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Journal of Animal and Veterinary Advances

Year: 2010  |  Volume: 9  |  Issue: 3  |  Page No.: 631 - 634

The Effect of Different Levels of Diet Protein on Broilers Performance in Ad libitum and Feed Restriction Methods

A. Azarnik, M. Bojarpour, M. Eslami, M.R. Ghorbani and K. Mirzadeh


The effect of different levels of diet protein and feed restriction was studied in broiler chicken. A total of 240 (Ros-308) day-old broiler chickens were randomly assigned to nine treatments each in 3 replicates of 10 birds per pen. The 2 protein level, 4 feed restriction level were used in 2x4 factorial arrangements in isoenergitic diets. The experiments lasted for 6 weeks. The feed consumption, body weight gain and Feed Conversion Ratio (FCR) were measured weekly. At the end experiment tow chickens from per pen were randomly selected, weighted, slaughtered and used to determine body parameters and data analysed. Feed restriction reduced significantly (p<0.05) body weight gain and feed consumption. Feed restriction had no significant effect on FCR. Diet protein level had no significant effect on performace. Feed restriction reduced carcass weight, breast weight and tigh weight.