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Low levels of copper and zinc proteinates maintain a normal mineral status in growing and finishing pigs
Conference paper   Open access

Low levels of copper and zinc proteinates maintain a normal mineral status in growing and finishing pigs

A. Hernández, B.P. Mullan, D.N. D'Souza and J. Pluske
Australasian Pig Science Association
Manipulating Pig Production XI. Proceedings of the 11th Australasian Pig Science Association (APSA) Biennial Conference (Brisbane, Australia, 25/10/2007–28/10/2007)
2007
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Abstract

A significant reduction in the levels of copper (Cu) (90%) and zinc (Zn) (40%) in the faeces of growing pigs was achieved without affecting pig growth when the inclusion level (IL) of Cu in the diet decreased from 50 ppm to 0 ppm Cu, and Zn from 80 to 40 ppm, both in the Bioplex® form (Hernandez et al, 2007). However it is important to establish if these low mineral levels enabled a normal mineral status to be maintained in the pigs. During digestion, minerals interact with each other and also with digesta components (e.g. phytate), which reduces the amount of each mineral that is absorbed. However it is likely that such interaction is less when minerals are supplied in the organic form due to the protection offered by the amino acid or peptides to which the mineral is chelated during manufacturing (Fairweather-Tait, 1996). In this study we examined the effect of feeding increasing IL of Cu together with low (treatments 1-4) or high (treatments 5-8) IL of Zn in the Bioplex® form on the status of biochemical markers of Cu, Zn and Fe in growing pigs.

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