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The responses in milk solids-not-fat and protein contents to improved feeding of cows receiving winter-stall diets and underfed for varying periods

Published online by Cambridge University Press:  01 June 2009

J. A. Wright ,
J. A. F. Rook  and
P. D. P. Wood
J. A. Wright
Affiliation:
Department of Agricultural Sciences, University of Leeds, Leeds, LS2 9JT
J. A. F. Rook
Affiliation:
Department of Agricultural Sciences, University of Leeds, Leeds, LS2 9JT
P. D. P. Wood
Affiliation:
Milk Marketing Board of England and Wales, Thames Ditton, Surrey
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Summary

The effect of varying periods of energy undernutrition on milk yield and composition was determined in 30 British Friesian cows receiving a typical winterstall diet. An absence of steaming-up, and underfeeding from the beginning of lactation, depressed both milk yield and solids-not-fat (SNF) content, especially in early lactation. Initially the reduction in milk SNF content was accounted for mainly by a loss in lactose content, but as lactation progressed this effect lessened and an effect on milk protein content was established. Protein content was similarly depressed by underfeeding in mid-lactation. The restoration of normal feeding in mid-lactation after varying periods of underfeeding was associated with only small responses in SNF and protein contents.

The effect of the type of basal diet and supplementary concentrates on the extent of the increase in SNF and protein contents in response to improved feeding was examined in 2 further experiments. Responses were in all instances small and it was concluded that with the diets commonly in use in Great Britain the provision during the winter period of supplementary concentrates, whatever their composition, is unlikely to give a marked improvement in milk SNF or protein contents.

Type
Research Article
Information
Journal of Dairy Research , Volume 41 , Issue 2 , June 1974 , pp. 155 - 164
Copyright
Copyright © Proprietors of Journal of Dairy Research 1974

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References

REFERENCES

Bath, I. H. & Rook, J. A. F. (1963). Journal of Agricultural Science 61, 341.CrossRefGoogle Scholar
Broster, W. H. & Tuck, V. J. (1967). Journal of Agricultural Science 69, 465.CrossRefGoogle Scholar
Dawson, R. R. & Rook, J. A. F. (1972). Journal of Dairy Research 39, 107.CrossRefGoogle Scholar
Evans, R. E. (1960). Bulletin of the Ministry of Agriculture, Fisheries and Food, no. 48, 15th edn.Google Scholar
Hinton, C. L. & Macara, T. (1927). Analyst 52, 668.CrossRefGoogle Scholar
Rook, J. A. F. (1961). Dairy Science Abstracts 23, 251.Google Scholar
Rook, J. A. F. & Balch, C. C. (1961). British Journal of Nutrition 15, 361.CrossRefGoogle Scholar
Rook, J. A. F. & Line, C. (1961). British Journal of Nutrition 15, 109.CrossRefGoogle Scholar
Snedecor, G. W. (1956). Statistical Methods, 5th edn.Ames, Iowa: Iowa State University Press.Google Scholar
Walsh, J. P. (1969). Irish Journal of Agricultural Research 8, 319.Google Scholar
Wright, J. A., Rook, J. A. F. & Panes, J. J. (1969). Journal of Dairy Research 36, 399.CrossRefGoogle Scholar