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Some observations on the lactation of Blackhead ewes and the growth of lambs: the composition and yield of milk

Published online by Cambridge University Press:  27 March 2009

M. H. Butterworth ,
T. R. Houghton ,
J. C. Macartney ,
A. J. Prior ,
C. P. Middlemiss  and
D. E. Edmond
M. H. Butterworth
Affiliation:
Faculty of Agriculture, University of the West Indies, Imperial College of Tropical Agriculture, Trinidad, W.I.
T. R. Houghton
Affiliation:
Faculty of Agriculture, University of the West Indies, Imperial College of Tropical Agriculture, Trinidad, W.I.
J. C. Macartney
Affiliation:
Faculty of Agriculture, University of the West Indies, Imperial College of Tropical Agriculture, Trinidad, W.I.
A. J. Prior
Affiliation:
Faculty of Agriculture, University of the West Indies, Imperial College of Tropical Agriculture, Trinidad, W.I.
C. P. Middlemiss
Affiliation:
Faculty of Agriculture, University of the West Indies, Imperial College of Tropical Agriculture, Trinidad, W.I.
D. E. Edmond
Affiliation:
Faculty of Agriculture, University of the West Indies, Imperial College of Tropical Agriculture, Trinidad, W.I.
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Summary

Using Persian Blackhead ewes, milk composition and the effect of diet on content of milk fat and milk yield were investigated. Analysis of the milk of nine ewes for fat, protein, ash and lactose (by difference) throughout a twelve-week lactation gave results which were compared with those in the literature. Average values were 5·9, 5·6, 1·0 and 4·8 % respectively. The milk of nine ewes fed on a high plane of nutrition contained significantly more fat than that of ewes fed on a low plane of nutrition; values were 8·8 and 8·3 % respectively. High plane ewes gave significantly more milk than low plane ewes. Ewes suckling twins gave significantly more milk than those suckling singles. Lambs suckling high plane ewes gained significantly more weight than those suckling low plane ewes both from birth to 3 weeks as well as from birth to 12 weeks. Male lambs gained significantly more weight than females.

Highly significant correlation coefficients were obtained between milk consumed by the lamb and its gain in weight. Conversion efficiencies of milk to gain in weight were calculated and compared with literature values.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 70 , Issue 2 , April 1968 , pp. 203 - 207
Copyright
Copyright © Cambridge University Press 1968

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References

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