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    Energy utilization and growth performance of broilers receiving diets supplemented with enzymes containing carbohydrase or phytase activity individually or in combination

    Energy utilization in broilers as influenced by supplementation of enzymes containing phytase or carbohydrase activities was investigated. Day-old male broilers (480) were allocated to four slaughter groups, thirty broilers in the initial slaughter group and 150 broilers in each of the final slaughter groups on days 7, 14 and 21. Broilers in each of the final slaughter groups were allocated to five treatments in a randomized complete block design, each treatment had six replicate cages of five broilers per replicate cage. The diets were maize-soybean based with wheat as a source of NSP. The treatments were: (1) positive control that met nutrient requirements of the day-old broiler chick, (2) negative control (NC) deficient in metabolizable energy and P, (3) NC plus phytase added at 1000 FTU/kg, (4) NC plus cocktail of xylanase, amylase and protease (XAP), and (5) NC plus phytase and XAP. Gain and gain: food were depressed (P,0o05) in the NC diet. Phytase improved (P,0o05) gain at all ages and gain: food at days 0-14 and days 0-21. There was improvement (P,0o01) in net energy for production, energy retained as fat and protein from days 0 to 14 and from days 0 to 21 in phytase-supplemented diet compared with the NC diet. Net energy for production was more highly correlated with performance criteria than metabolizable energy and may be a more sensitive energy utilization response criterion to use in evaluating broiler response to enzyme supplementation
    Document information
    Product / service: Carbohydrases and Proteases
    Publication date: 01/01/2008
    Species: Poultry, Broiler
    Authors: Oluyinka AO, Cowieson AJ, Olayiwola A
    Doctype: Publications & Citations
    Publication / conference: British Journal of Nutrition, volume 99
    Regions and countries: Global
    Keywords: activity, age, amylase, broiler, chick, broilers, cages, carbohydrase, combination, control, diet, diets, energy, utilization, enzyme, supplementation, enzymes, fat, gain, growth, performance, male, metabolizable, net, nsp, nutrient, requirements, p, per, criteria, phytase, production, protease, protein, requirement, response, slaughter, source, treatment, wheat, xylanase
    Production challenge(s): Gut health
    Diets: Wheat, Wheat and barley & high fibre by-products, Corn & sorghum meal
    Brands: Axtra® AB, Axtra® XAP, Axtra® PHY, Optimize Feed, Phyzyme® XP, Phycheck, Danisco Xylanase, Avizyme® 1200, Avizyme® 1300, Avicheck, Avizyme® 1500, Avicheck Corn, FASTKit assay
    Resource ref: 9730
    This material is related to a conference
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