بررسي تاثير سطوح مختلف پروتيين و انرژي خوراك در عملكرد پرواري گوساله هاي نر گاوميش آذربايجان غربي

Effect of different level of dietary protein and energy on growth of male buffalo calves

An experiment was conducted to determine the effects of three level of crude protein (10.8? 11.6 and 13%) and metabolizable energy (2.02? 2.3 and 2.57 Mcal/Kg DM) on growth of 45 male Azerbaijan buffalo calves for 12 months. The diet were fed as TMR (total mixed ration) and ad lib. Eighteen calves were slaughtered at the end of the trial. The experimental data were subjected to analysis of variance as a completely randomized design with 9 treatments and 5 replications and mean values were compared by the Duncan test. Experimental diets had significant effects on feed conversion? internal fat (p< 0.05) and feed intake (p<0.01). Daily weight gain? carcass percentage? lean meat? bone and fat were not affected by the treatments (p>0.05). The diet with 11.6 % CP and 2.56Mcal ME/Kg DM has the best performance due to the lowest feed conversion? highest daily weight gain and the best carcass characteristics.