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At this study, a total of 1500 broiler chicken ROSS 308 strain with 10 treatments, 5 replicates, and 30 chicks per replicate was used. The experimental treatments were as bellow: 1- starter period 3%, grower period 6 %, finisher period 9 %; 2- starter period 3%, grower period 6 %, finisher period 12 %; 3- starter period 3%, grower period 6 %, finisher period 15 %; 4- starter period 3%, grower period 9 %, finisher period 9 %; 5- starter period 3%, grower period 9 %, finisher period 12 %; 6- starter period 3%, grower period 9 %, finisher period 15 %; 7- starter period 3%, grower period 12 %, finisher period 12 %; 8- starter period 3%, grower period 12 %, finisher period 15 %; 9- starter period 3%, grower period 12 %, finisher period 18 %; 10- diet of the whole period of rearing based on corn and soybean meal without sunflower meal. The results showed that the experimental treatments had no effect on body weight, feed intake, feed conversion ratio, production index, feed cost per kg live weight, carcass characteristics, and intestine morphology of broiler chickens (P>0.05). The prioritization of the experimental treatments using TOPSIS showed that treatment 2 was preferred to other treatments for broiler chickens.
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