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Effects of dietary deficiencies of energy, protein and calcium on the pregnant ewe. I. Body composition and mineral content of the ewes

Published online by Cambridge University Press:  27 March 2009

A. R. Sykes  and
A. C. Field
A. R. Sykes
Affiliation:
Moredun Research Institute, Edinburgh, EH17 7JH
A. C. Field
Affiliation:
Moredun Research Institute, Edinburgh, EH17 7JH
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Summary

Forty 6½-year-old Scottish Blackface ewes were used in an experiment to investigate the effects of low protein and low calcium (Ca) intakes during pregnancy on body composition and mineral contents. Six sheep were slaughtered at the commencement of the experiment as controls; 28 were used in a 2 × 2 factorial experiment in which semipurified diets containing 11·8 and 6·0% crude protein (CP) and 1·2 and 0·11% Ca in the dry matter were offered to maintain non-esterified fatty acids (NEFA) and ketone bodies in the plasma at levels comparable to those found in hill sheep in winter. All ewes were slaughtered after parturition and the carcase dissected into soft tissue and skeleton fractions. Both fractions were dissolved in HNO3 and the fat and mineral contents measured.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 78 , Issue 1 , February 1972 , pp. 109 - 117
Copyright
Copyright © Cambridge University Press 1972

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