Characteristics of carcass and viscera of broiler chickens fed with diets containing beta mananase enzyme and deactivated soybean
Keywords:
Enzynes, Supplementation, Carcass yield, Digestive tractAbstract
This study aimed to evaluate the carcass characteristics and gastrointestinal biometry of broiler chickens fed with ration containing deactivated soybean supplemented with levels of beta mannanase enzyme. For this purpose, 1152 broilers from different lots of COOB 500 lineage were used. They were distributed in a completely randomized design in a 4x2 factorial scheme, with four levels of beta mannanase enzyme (0, 80, 160, 240g/ton) and inclusion or not of deactivated soybean, with eight replicates with 18 birds in each experimental unit. On the 42nd day, carcass, cuts, and viscera yield, in weight and percentage, and the gastrointestinal biometry of broiler chickens were evaluated. The post-fast weight, full carcass, empty carcass, breast, thigh, and drumstick had higher weight (p<0.05) for the treatment with the inclusion of deactivated soy. However, there was no difference (p>0.05) in the yield of edible viscera. In addition, there was an increase (p<0.05) in the gastrointestinal tract of birds as the enzyme beta mannanase was added. Thus, the use of deactivated soybean combined with the supplementation of 240 mg of beta mannanase enzyme in broiler chicken diets from 1 to 42 days of age is indicated, as it favors carcass yield and the morphology of the gastrointestinal tract of the birds.
Keywords: Enzymes, supplementation, carcass yield, digestive tract
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