Investigations on iron bioavailability of different sources and supply levels in piglets

Two experiments were conducted to investigate the iron bioavailability of different sources and supply levels in piglets. In experiment 1, the influence of feeding an iron deficient basal diet or the basal diet supplemented with 28 ppm Fe either in form of Fe-chelate, crystalline Fe-glycinate, or Fe...

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Bibliographic Details
Published in:Journal of animal physiology and animal nutrition 2008-02, Vol.92 (1), p.35-43
Main Authors: Ettle, T, Schlegel, P, Roth, F.X
Format: Article
Language:English
Subjects:
Animal Feed
Animal Nutritional Physiological Phenomena
Animals
Animals, Newborn
Biological Availability
Digestion - drug effects
Dose-Response Relationship, Drug
Female
Intestinal Absorption - drug effects
iron bioavailability
iron chelate
Iron Chelating Agents - pharmacology
iron glycinate
iron sulphate
Iron, Dietary - pharmacokinetics
Male
piglet
piglets
Random Allocation
Swine - blood
Swine - growth & development
Swine - metabolism
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Summary:Two experiments were conducted to investigate the iron bioavailability of different sources and supply levels in piglets. In experiment 1, the influence of feeding an iron deficient basal diet or the basal diet supplemented with 28 ppm Fe either in form of Fe-chelate, crystalline Fe-glycinate, or Fe-sulphate on apparent iron digestibility and on blood parameters was determined. In experiment 2, a dose-response approach was used to determine the effects of supplementing an iron-deficient basal diet with 30, 60, or 90 ppm of Fe either in form of crystalline Fe-glycinate or Fe-sulphate on digestibility of Fe, growth and blood parameters. In experiment 1, comparison of iron sources revealed a tendency (0.05 < p < 0.1) for a higher Fe digestibility from Fe-glycinate (40.9%) compared with Fe-chelate (30.8%) or Fe-sulphate (30.7%). Fe-balance was higher (p < 0.05) for Fe-glycinate compared with Fe-sulphate but iron balance was similar for iron sulphate and iron chelate. Those results, however, were not reflected in data of blood parameters. In experiment 2, iron digestibility, blood parameters and performance were significantly (p < 0.05) influenced by iron supply. Effects of iron source on digestibility of iron were lower than observed in the first experiment.
ISSN:0931-2439
1439-0396
DOI:10.1111/j.1439-0396.2007.00707.x