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    Phytase in non-ruminant animal nutrition; a critical review

    This review focuses on phytase functionality in the digestive tract of farmed non-ruminant animals and the factors influencing in vivo phytase enzyme activity. In pigs, feed phytase is mainly active in the stomach and upper part of the small intestine, and added phytase activity is not recovered in the ileum. In poultry, feed phytase activities are mainly found in the upper part of the digestive tract, including the crop, proventriculus and gizzard. For fish with a stomach, phytase activities are mainly in the stomach. Many factors can influence the efficiency of feed phytase in the gastrointestinal tract, and they can be divided into three main groups: (i) phytase related; (ii) dietary related and (iii) animal related. Phytase-related factors include type of phytase (e.g. 3- or 6-phytase; bacterial or fungal phytase origin), the pH optimum and the resistance of phytase to endogenous protease. Dietary-related factors are mainly associated with dietary phytate content, feed ingredient composition and feed processing, and total P, Ca and Na content. Animal-related factors include species, gender and age of animals. To eliminate the antinutritional effects of phytate (IP6), it needs to be hydrolyzed as quickly as possible by phytase in the upper part of the digestive tract. A phytase that works over a wide range of pH values and is active in the stomach and upper intestine (along with several other characteristics and in addition to being refractory to endogenous enzymes) would be ideal.
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    Document information
    Product / service: Phytases, Services
    Publication date: 08/11/2014
    Species: Multi-species
    Authors: Dersjant-Li Y, Awati A, Partridge G, Schulze H
    Doctype: Conference Presentations & eBooks
    Publication / conference:
    Regions and countries:
    Keywords: phytate, animal, feed, IP6, ph, level, dose, dosage
    Production challenge(s): Phytate degredation to improve profitability and performance
    Diets: All diets
    Brands: Axtra® PHY, Phyzyme® XP, FASTKit assay, Optimize Feed
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