Mineral content of eggs differs with hen strain, age, and rearing environment

Poultry Science
Laura E HeflinSusan K Raatz

Abstract

Egg nutrient quality is strongly influenced by hen diet but is also affected by rearing environment, hen strain, and hen age. The objective of the current study was to determine the effect of: 1) conventional battery cages, 2) enrichable cage systems, 3) enriched colony housing, 4) cage-free, and 5) free-range rearing systems on mineral concentrations of whole, dried egg (yolk and albumen combined) from TA Tetra White (TW) and Hy-Line Brown (HB) hens at 44, 68, and 88 wk of age. We hypothesized that mineral concentration of eggs would differ among rearing systems but not between strains or with hen age. Hens held in enriched colony housing systems produced eggs with 10% lower Mg and 11% lower Mn levels than conventional hens. Concentrations of Ca and Cu were higher (7 and 8%, respectively) in eggs from TW hens than from HB hens. Eggs from HB hens had 8% higher concentrations of Fe, 6% higher Mg and 5% higher Mn than TW hens. Mn was higher in eggs from 44-wk hens than from 68- or 88-wk hens (16 and 11%, respectively). Interaction effects between rearing environment and hen age were observed for K and Mn concentrations. Eggs from 68-wk hens in conventional rearing systems contained 14 to 21% more K than eggs from conventional hen...Continue Reading

References

Feb 24, 2001·Poultry Science·T A Scott, F G Silversides
May 15, 2007·Poultry Science·K E Anderson, K W Koelkebeck
Sep 10, 1948·The Journal of Nutrition·M B GILLIS
Mar 12, 2009·Poultry Science·G B TactacanJ D House
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Apr 15, 2011·Poultry Science·N P JohnstonD E Johnston
Nov 16, 2011·Journal of Community Health·S L PollockT Kosatsky
Dec 3, 2016·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Dede N EkoueAlan M Diamond

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