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Effects of high levels of vitamin e supplementation in heat stressed laying hens

Published online by Cambridge University Press:  20 November 2017

Sandy Bollengier
Affiliation:
Rhône Poulenc Nutrition Animale, 03600 Commentry, France
G. Uzu
Affiliation:
Rhône Poulenc Nutrition Animale, 03600 Commentry, France
P.E.V. Williams
Affiliation:
Rhône Poulenc Nutrition Animale, 03600 Commentry, France
C.C. Whitehead
Affiliation:
AFRC, Roslin Institute, Roslin, Midlothian, EH25 9PS, Scotland
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Extract

It was investigated in a small-scale study using a climate-controlled room at IAPGR, Roslin, that the effects of feeding a high level of supplemental vitamin E (500 mg/kg) on egg production and plasma concentrations of egg-associated metabolites in laying hens subjected to a short exposure (7 days) to a moderate heat stress (temperature of 32°C). The study showed, on small group sizes (12 birds / group), that in control birds (fed 30 mg supplemental vitamin E/kg), this degree of heat stress depressed egg production by about 30%. In the birds receiving the high level of vitamin E, egg production was maintained at levels very close to those prior to the heat stress. The objective of this experiment was to confirm in a larger scale the effects of high levels of dietary vitamin E on egg production of hens exposed to a chronic heat stress and during a period of recovery at thermoneutral temperatures.

Type
Poultry
Copyright
Copyright © The British Society of Animal Science 1995

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References

Smith, A J. and Oliver, J., 1972. Some nutritional problems associated with egg production at high environmental temperature. 4) The effect of prolonged exposure to high environmental temperature.Rhodesian Journal of Agricultural Research, Vol. 10, pp.4360 Google Scholar
Whitehead, C.C., Mitchell, M.A., McCormack, H.A. and Carlisle, A., 1994. Response of plasma creatine kinase to dietary vitamin E in heat stress in broilers. Proc. Austr. Poult. Sci. Sym., Vol. 6, p.l13 Google Scholar