عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In this study 60 Arian male chickens for six weeks were used in a completely randomized block to evaluate the effect of three dietary energy level on performance and prevention ascites. Diets energy levels were: as catalog; 100 and 150 kcal lower in starter and grower and finisher periods; 200 kcal and 300 kcal lower in starter and grower that catalog respectively. During the experiment, body weight, feed intake, feed conversion ratio, mortality rate and production index were determined. Hematocrit and blood parameters were measured at 35 days of age. At the end of the experiment, carcass characteristics and the right ventricle (RV) weight and total ventricle (TV) weight ratios were determined and compared. Reducing dietary energy level was increased body weight gain and feed intake (P<0.05). Feed cost per kg of weight gain was reduced by reducing dietary energy level (P<0.05). Reducing dietary energy level decreased the amount of hemoglobin and hematocrit (P<0.05) and increased the cortisol level (P<0.05). T3 hormone was not affected by diet energy, but T4 was increased by Reducing dietary energy (P<0.05). Also T3 to T4 ratios was reduced by Reducing dietary energy (P<0.05). Results showed that reducing 100 kcal diet energy in starter and 150 kcal in the grower and finisher periods than the Arian catalog was performed better than the other two energy levels on performance and parameters related to ascites.