Meta-analysis of effects of microbial phytase on digestibility and bioavailability of copper and zinc in growing pigs

P. Bikker, A.W. Jongbloed, J.T.N.M. Thissen

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

A meta-analysis was conducted to determine the effect of microbial phytase in pig diets on digestibility and bioavailability of Cu and Zn. Studies (n = 22) into effects of microbial phytase on digestibility and plasma levels of Cu and Zn were included in a dataset and regression analysis was performed to quantify the effect of Aspergillus niger derived 3-phytase in studies (n = 14) with a maximum dietary Zn content of 100 mg/kg and a maximum Cu addition of 20 mg/kg. Phytase inclusion increased digestibility of Zn (P = 0.003) and plasma Zn content (P <0.001) without affecting digestibility and plasma level of Cu. Based on a comparison with dose-response studies with Zn, we estimated 500 phytase units (FTU) of microbial phytase is equivalent to 27 mg of Zn from ZnSO(4).
Original languageEnglish
Pages (from-to)134-136
JournalJournal of Animal Science
Volume90
Issue numbersuppl. 4
DOIs
Publication statusPublished - 2012

Keywords

  • dietary zinc
  • piglets

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