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    Xylanase supplementation improves energy digestibility of wheat by-products in grower pigs

    Value-added processing of cereals produces high-value fractions for food and bio-processing application and by-products that are used in animal nutrition to reduce feed costs. Wheat by-products contain arabinoxylans that might limit nutrient digestibility. Effects of xylanase supplementation (0 or 4375 U/kg feed) on energy digestibility were studied in a wheat control and by-product diets (30% millrun, middlings, shorts, screenings, and bran) in a 2z6 factorial arrangement. The wheat control diet was formulated to contain 3.34 Mcal digestible energy (DE)/kg and 2.8 g apparent digestible lysine/Mcal DE, and included 0.4% chromic oxide as a marker for digestibility. Twelve ileal-cannulated pigs (32.52.5 kg) were each fed seven of 12 diets. Faeces and then digesta were each collected for 2 d, and diet digestibility values are reported. Wheat had higher ileal and total-tract energy digestibility than by-products (P<0.01). Xylanase improved energy digestibilities for by-products (P<0.001) but not for wheat. Among by-products, ileal energy digestibility was lowest for middlings (62%), then bran<screening<millrun, and highest for shorts (66%). Xylanase improved (P<0.05) ileal energy digestibility of millrun by 19% to 76%. Total-tract energy digestibility of millrun improved from 72 to 79% (similar to wheat) with xylanase (P<0.05). In summary, xylanase improved energy digestibility in the selected wheat by-product diets, indicating that arabinoxylans in wheat by-products limit nutrient digestibility
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    Product / service: Carbohydrases and Proteases
    Publication date: 01/01/2007
    Species: Pig, Nursery/piglet, Grower/finisher
    Authors: Nortey TN, Patience JF, Sands JS, Zijlstra RT
    Doctype: Publications & Citations
    Publication / conference: Livestock Science
    Regions and countries: Global
    Keywords: animal, nutrition, application, arabinoxylan, arabinoxylans, bran, by-products, cereal, cereals, chromic, oxide, control, cost, costs, dan, de, diet, diets, digesta, digestibilities, digestibility, digestible, energy, effects, faeces, feed, food, fractions, grower, pigs, ileal, marker, nutrient, pig, processing, screening, supplementation, wheat, xylanase
    Production challenge(s): Gut health
    Diets: Corn, broken rice, sorghum & wheat by products, Wheat, rye & triticale, Wheat, rye and tricale containing by-products, Mixed grain, Barley/Oats
    Brands: Axtra® AB, Porzyme® 9300, Porcheck, Danisco Xylanase, Axtra® XAP, Porzyme®
    Resource ref: 9225
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