Replacement of inorganic phosphorus by microbial phytase for young pigs fed on a maize-soyabean-meal diet

The British Journal of Nutrition
E T Kornegay, H Qian

Abstract

Ninety-six crossbred young pigs (body weight 7.8 kg) were used in a 5-week trial to determine the effectiveness of microbial phytase (EC 3.1.3 26) in improving the bioavailabilities of P and other nutrients in maize-soyabean-meal diets and, thus, replacing inorganic P with phytase. A 2 x 5 factorial arrangement of treatments was employed with two available P (aP) levels (0.7 and 1.6 g/kg) and five phytase levels (0, 350, 700, 1050, 1400 U (the quantity of enzyme that liberates 1 mumol inorganic phosphate/min from 5.1 mm-sodium phytate at pH 5.5 and 37 degrees)/kg diet). In addition, two extra diets were formulated to supply the National Research Council (1988) recommended level of aP (3.2 g/kg) with 0 or 1400 U phytase. The addition of graded levels of phytase resulted in linear increases in average daily weight gain, average daily feed intake and weight gain:feed intake for pigs fed on diets containing 0.7 or 1.6 g aP/kg (P < 0.04). Also, the addition of phytase linearly increased apparent digestibilities of P and Ca (P < 0.01), whereas faecal P excretion was linearly decreased (P < 0.01). Linear increases in shear force, shear energy and ash content of both the metacarpal and tenth rib, and shear stress of the metacarpal were...Continue Reading

References

Sep 1, 1990·The British Journal of Nutrition·P C SimonsG J Verschoor
Mar 1, 1985·Journal of Animal Science·M E Koch, D C Mahan

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Citations

Mar 25, 2005·Journal of Animal Physiology and Animal Nutrition·A LiesegangJ Risteli
Dec 6, 2007·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·J K Apple
Mar 19, 2013·Journal of Animal Science and Biotechnology·Ferdinando Nielsen AlmeidaHans Henrik Stein
Mar 22, 2018·Journal of Animal Science·K M GourleyR D Goodband
Jun 16, 2006·Journal of Animal Science·W J PowersR Angel
Jan 21, 2006·Journal of Animal Physiology and Animal Nutrition·P S RevyY Nys
Oct 4, 2012·Animal : an International Journal of Animal Bioscience·M P Létourneau-MontminyA Narcy
Nov 28, 2013·Preparative Biochemistry & Biotechnology·Suma SanikommuLakshmipathi Vadalkonda
Feb 1, 2018·Journal of Animal Science·Kiah M GourleyRobert D Goodband
Oct 9, 2004·Journal of Animal Science·K F KnowltonD A Emmerson

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