Effects of energy and lysine level on performance and reproductive traits of Arian broiler breeder hens during production periods

An experiment was carried out with 140 Arian broiler breeder hens and 20 males at 26 weeks of age. This experiment was done in 2×2 factorial arrangement in a completely randomized design with 20 experimental units and lasted 40 weeks. Dietary treatments were formulated with 2 levels of energy including 2740 and 2540 Kcal/Kg and two level of digestible lysine (0.54 and 0.61 %). Dietary energy level had no significant effect on egg production, egg weight and feed conversion ratio, but hens were received lower energy level had a lower daily weight gain compare to the hens received high energy level (p