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The effect of feeding magnesium-enriched diets on the quality of the albumen of stored eggs

Published online by Cambridge University Press:  06 August 2007

J. B. Monsey ,
D. S. Robinson ,
W. S. Miller  and
Margaret Ellis
J. B. Monsey
Affiliation:
ARC Food Research Institute, Colney Lane, Norwich NR4 7UA
D. S. Robinson
Affiliation:
ARC Food Research Institute, Colney Lane, Norwich NR4 7UA
W. S. Miller
Affiliation:
Kennett Nutritional Centre, Spillers Ltd, Bury Road, Kennett, Newmarket, Suffolk CB8 8QU
Margaret Ellis
Affiliation:
Kennett Nutritional Centre, Spillers Ltd, Bury Road, Kennett, Newmarket, Suffolk CB8 8QU
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Abstract

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1. Pullets were given from 1-d-old diets containing 1.6, 4.1, 8.1 and 12.0 g Mg/kg. Only small effects of these diets on live weight, food consumption, egg number, egg weights or egg-shell thickness were observed except at the highest level (12.0 g Mg/kg) which caused diarrhoea and an appreciable lowering of the live weight of growing pullets. A further group was given from point-of-lay a diet containing 9.3 g Mg/kg.

2. Eggs laid on 3 consecutive days from each of eighteen hens were collected at intervals of 3 weeks until the birds were 68.5 weeks old. Eggs laid on the 3rd day were used to determine the initial proportion of thick egg-white present and also the concentration of Mg, Ca, Na and K in the thick egg-white. Eggs laid on the 1st and 2nd days were stored at 20° for 20 d to establish the proportion of thick egg-white remaining after storage.

3. With the unsupplemented diet the proportion of residual thick egg-white after storage of eggs for 20 d at 20° was 306, 161 and 305 mg/g total egg-white when the hens were 26.5, 53.5 and 68.5 weeks of age respectively. When the diet containing 9.3 g Mg/kg was given, the proportion of thick egg-white after storage remained approximately 400 mg/g throughout the period of the trial.

4. The mean Mg concentration in the thick egg-white of eggs laid by hens given unsupplemented diets was 5.77 mm. The addition of extra Mg to the diet increased the content of Mg in the thick egg-white, for example when the diet contained 9.3 g Mg/kg the mean concentration rose to 7.69 mm.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 37 , Issue 1 , January 1977 , pp. 35 - 44
Copyright
Copyright © The Nutrition Society 1977

References

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