Improvement of phosphorus availability by microbial phytase in broilers and pigs

Techniques have been developed to produce microbial phytase for addition to diets for simple-stomached animals, with the aim to improve phosphorus availability from phytate-P in plant sources. The activityof the crude microbial phytase showed pH optima at pH 5-5 and 2·5. The enzyme was able to degra...

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Bibliographic Details
Published in:British journal of nutrition 2005, Vol.93 (1), p.137-152
Main Authors: SIMONS, P. C. M, VERSTEEGH, H. A. J, JONGBLOED, A. W, KEMME, P. A, SLUMP, P, BOS, K. D, WOLTERS, M. G. E, BEUDEKER, R. F, VERSCHOOR, G. J
Format: Article
Language:English
Subjects:
alpha-amylase
Biological and medical sciences
Feed and pet food industries
Food industries
Fundamental and applied biological sciences. Psychology
phytic acid
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Summary:Techniques have been developed to produce microbial phytase for addition to diets for simple-stomached animals, with the aim to improve phosphorus availability from phytate-P in plant sources. The activityof the crude microbial phytase showed pH optima at pH 5-5 and 2·5. The enzyme was able to degradephytate in vitro in soya-bean meal, maize and a liquid compound feed for pigs. When microbial phytasewas added to low-P diets for broilers the availability of P increased to over 60 % and the amount of Pin the droppings decreased by 50%. The growth rate and feed conversion ratio on the low-P dietscontaining microbial phytase were comparable to or even better than those obtained on control diets.Addition of microbial phytase to diets for growing pigs increased the apparent absorbability of P by24%. The amount of P in the faeces was 35% lower.
ISSN:0007-1145
1475-2662