Nutrient utilization and manure P excretion in growing pigs fed corn-barley-soybean based diets supplemented with microbial phytase

• Published in: Animal science journal 2009-02, Vol.80 (1), p.19-26
• Main Authors: Emiola, A.(University of Manitoba, Winnipeg (Canada)), Akinremi, O, Slominski, B, Nyachoti, C.M
• Format: Article
• Language: English
• Subjects: 6-Phytase - administration & dosage; Animal Feed; Animal Husbandry; Animal Nutritional Physiological Phenomena; Animal sciences; Animals; Calcium - metabolism; CERDO; CRECIMIENTO; CROISSANCE; DIET; DIETA; Dietary Supplements; DIGESTIBILIDAD; DIGESTIBILITE; DIGESTIBILITY; Digestion - drug effects; Digestion - physiology; Enzymes; EXCRECION; EXCRETION; FISIOLOGIA DE LA NUTRICION; FITASA; FOSFORO; Glycine max; GROWTH; Hogs; Hordeum; Manure; Manures; Nitrogen - metabolism; nutrient utilization; Nutrients; NUTRITION PHYSIOLOGY; NUTRITIVE VALUE; PHOSPHORE; PHOSPHORUS; Phosphorus - metabolism; PHYSIOLOGIE DE LA NUTRITION; PHYTASE; pigs; PORCIN; REGIME ALIMENTAIRE; SWINE; VALEUR NUTRITIVE; VALOR NUTRITIVO; Zea mays
• ISSN: 1344-3941; 1740-0929
• DOI: 10.1111/j.1740-0929.2008.00590.x

ABSTRACT The effect of high levels of microbial phytase supplementation in diets for growing pigs was studied in a 2‐week performance and nutrient digestibility trial involving 28 growing pigs weighing 16.4 ± 1.06 (mean ± SD) kg. Seven corn‐barley‐soybean meal‐based diets consisting of a positive control (PC) formulated to meet or exceed NRC nutrient requirements; a negative control (NC) with non‐phytate P reduced by 0.1% unit from NRC requirement and fed without or with 500 or 1000 U/kg; a doubled negative control (DNC) with no added inorganic P and fed without or with 2000 or 4000 U/kg. Chromic oxide was added as an indigestible marker and all diets were fed as mash. Pigs fed the PC diet had a higher P digestibility compared with those fed the NC (P