عنوان مقاله [English]
نویسندگان [English]چکیده [English]
This experiment was carried out to study effect of supplementary multi enzyme (0, 4 gr per 100 kg of diet) to corn-soybean meal based diets with different levels of Tomato Pomace (TP, 0, 2, 4, 6 and 8 %, respectively) on chick performance and carcass traits. Four hundred and eighty 480 day-old chicks (Ross-308) were employed [four replicates (n=20)] in a completely randomized experimental design of a factorial arrangement of 2×5. The results revealed that in starter stage the addition of 6% TP to diet significantly decreased weight gain in comparison with control. Feed intake and conversion ratio were greater (p<0.05) in broilers fed with 8 and 6% TP in comparison with control. Although feed consumption, weight gain and feed conversion ratio were not different among treatments in grower and weight gain in the total period, but feed intake and conversion ratio were significantly affected by inclusion of TP (p<0.05). The supplementation of enzyme (during the total period) exerted a significant effect on weight gain and feed conversion ratio (p< 0.05), but the cumulative feed consumption was not significantly affected by the enzyme. The different levels of TP significantly affected the breast (p< 0.05), but had no significant effect on carcass and thigh percentages. The results of the study indicated that the addition of multi-enzyme to diets (0, 2, 4, 6 and 8 % of TP) in comparison with no enzyme addition caused the improvement performance of broiler chicks, suggesting the use of 4% TP plus enzyme recommended in broiler diets.