Additional dietary zinc for weaning piglets is associated with elevated concentrations of serum IGF-I

Journal of Animal Physiology and Animal Nutrition
Dorthe CarlsonM Vestergaard

Abstract

Two experiments were performed in order to study how weaning and post-weaning dietary zinc level affect serum IGF-I. Further, whether the growth-enhancing effect of 2500 ppm of dietary zinc (Zn2500) and/or 175 ppm of dietary copper (Cu175) in post-weaning diets is associated with elevated serum IGF-I levels in piglets was studied. Experiment 1 included 54 piglets (six litters of nine piglets). One piglet from every litter was assigned to a control group (blood sampled 1 day before weaning). At weaning the remaining eight piglets from every litter were allocated randomly to four dietary treatments with increasing zinc inclusions (Zn100, Zn250, Zn1000, Zn2500). In exp. 2, 48 piglets (six litters of eight piglets) were allocated to four dietary treatments (Zn100, Zn100Cu175, Zn2500, Zn2500Cu175). All piglets in exp. 1 were blood sampled at -1, 1-2, 5-6 or 14-15 days after weaning and in exp. 2 blood samples were taken from all pigs 5-7 days after weaning. Feed intake was recorded per pen (two piglets) and weight gain was recorded for every piglet. Just after weaning feed intake was very low, piglets lost weight and serum IGF-I decreased in exp. 1. However, the piglets fed 2500 ppm of zinc reached pre-weaning levels of serum IGF-I ...Continue Reading

Citations

Feb 25, 2014·Biological Trace Element Research·Yuanfei MaYizhen Wang
Jan 16, 2007·Journal of Animal Physiology and Animal Nutrition·D CarlsonH D Poulsen
May 5, 2004·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Dorthe CarlsonJakob Sehested
Aug 7, 2014·BMC Gastroenterology·Camila A A de QueirozReinaldo B Oriá
Nov 30, 2007·Journal of Food Protection·Shivani Ojha, Magdalena Kostrzynska

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