Background & Aim: Starch is one of the important energy producing components in food rations. The type of starch present in grains is different in terms of digestibility, energy production and adhesion in the intestine. Since in the food rations used by poultry, dif
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Background & Aim: Starch is one of the important energy producing components in food rations. The type of starch present in grains is different in terms of digestibility, energy production and adhesion in the intestine. Since in the food rations used by poultry, different food sources are used in order to provide the required energy, therefore the energy provided can also be variable. In the present experiment, the effects of using grain seeds, soft wheat and durum wheat as sources of energy supply and its effect on the performance, characteristics of the digestive system and the composition of feces of broiler chickens were evaluated.
Materials & Methods: In order to investigate the effects of corn, soft wheat and durum wheat based diets with and without enzymes on performance, carcass traits, digestive system weight, protein and feces moisture of broiler chickens, out of 480 pieces of Ras-308 broiler chickens, in A 2*5 factorial experiment with 10 diets including (maize-based diet, 15 and 30% soft wheat, 15 and 30% durum wheat) and two enzyme levels (zero and 0.05% of diet) in the form of a completely randomized design with 10 Treatments, 4 replicates and 12 chicken were used in each replicate.
Results: The results showed that the type of diet and enzyme had no significant effect on performance (P<0.05). 30% of durum wheat increased breast percentage (P<0.05). Feeding birds with diet containing enzyme increased the percentage of carcasses and decreased the percentage of stone (P<0.05). The use of enzyme in the rations decreased the protein excretion and the lowest amount of stool protein was obtained with the ration containing 30% soft wheat and enzyme. Stool moisture and digestive tract characteristics were not affected by the type of diet and enzyme used (P<0.05).Conclusion: The use of different diets did not have significant effects on performance, but the use of 30% durum wheat and enzyme can have positive effects on carcass traits.
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