Effect of microbial phytase on apparent ileal amino acid digestibility of phosphorus-adequate diets in growing pigs

Archives of Animal Nutrition
Sona NitrayováJaroslav Heger

Abstract

Six ileally cannulated pigs (mean initial body weight 34.8 kg) were used to study the effect of microbial phytase on apparent ileal digestibility of P, total N and amino acids. Three P-adequate diets (digestible P concentration 2.3 g kg(- )l) containing barley (B), soyabean meal (S) or a mixture of the two (BS) with or without phytase supplement (1000 FTU x kg(-1)) were fed to pigs using a 6 x 6 Latin square design. The addition of phytase increased (p < 0.05) apparent ileal P digestibility of diets B, S and BS by 16.5, 19.2 and 19.2%, respectively. There was no effect of phytase on the ileal digestibility of total N. Apparent ileal digestibility of amino acids tended to increase in the BS diet supplemented with phytase (mean improvement of 2.2%); but no significant difference was found for any amino acid as compared with the unsupplemented diet. To asses the additivity of apparent amino acid digestibility, the determined values for the BS diet were compared to those calculated from digestibilities found in diets B and S. There were no significant differences between the determined and calculated values. It is concluded that the addition of microbial phytase to P-adequate diets does not affect ileal amino acid digestibility in ...Continue Reading

References

Sep 1, 1990·The British Journal of Nutrition·P C SimonsG J Verschoor
Jan 1, 1980·Critical Reviews in Food Science and Nutrition·M Cheryan
May 1, 1997·Journal of Animal Science·P R O'QuinnE J Gregg
Dec 1, 2000·Nutrition Research Reviews·P H SelleW L Bryden

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Citations

Feb 9, 2016·Journal of Animal Physiology and Animal Nutrition·J SchmeisserF Fru-Nji
Jul 22, 2017·Animal Science Journal = Nihon Chikusan Gakkaihō·Hongliang WangXiangshu Piao

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Methods Mentioned

BETA
atomic absorption spectrometry
ion-exchange chromatography

Software Mentioned

Unistat

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