Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-03T00:25:10.478Z Has data issue: false hasContentIssue false
  • English
  • Français

The winter decline in the solids-not-fat content of herd bulk-milk supplies

Published online by Cambridge University Press:  01 June 2009

J. A. Wright ,
J. A. F. Rook  and
J. J. Panes
J. A. Wright
Affiliation:
Division of Agricultural Chemistry, School of Agricultural Sciences, University of Leeds
J. A. F. Rook
Affiliation:
Division of Agricultural Chemistry, School of Agricultural Sciences, University of Leeds
J. J. Panes
Affiliation:
National Agricultural Advisory Service, Government Buildings, Lawnswood, Leeds 16
Get access Rights & Permissions [Opens in a new window]

Summary

(1) A survey of the composition of the milk of individual cows in 4 commercial herds in the West Riding of Yorkshire was undertaken from October 1967 to May 1968.

(2) In 3 of the 4 herds there was a decline in solids-not-fat (SNF) content throughout the winter feeding period. Milk protein content was at a minimum in January–February but in all 3 herds lactose content also declined and in 2 of the herds this was the major cause of the fall in SNF content.

(3) The decline in lactose content was the result partly of the characteristic effect of an advance in lactation, partly of an increase in the incidence of mastitis throughout the winter period. In all herds there was a significant inverse relationship between lactose content and cell count in the bulked milk of individual cows.

(4) In 3 of the herds autumn-calving (October–December) animals showed a pronounced fall in milk protein content in the early months of lactation which was not observed in summer-calving (July–September) animals. There was no response in SNF or protein content to supplementary concentrates offered towards the end of the winter-feeding period, whereas with the commencement of grazing in the spring there was an immediate increase in both protein and SNF contents.

Type
Original Articles
Information
Journal of Dairy Research , Volume 36 , Issue 3 , October 1969 , pp. 399 - 407
Copyright
Copyright © Proprietors of Journal of Dairy Research 1969

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anon (1967). U.K. Dairy Facts and Figures. The Federation of United Kingdom Marketing Boards.Google Scholar
Anon (1968). Tech. Bull. Minist. Agric. Fish. Fd no. 17.Google Scholar
British Standards Institution (1951). B.S. 1741.Google Scholar
British Standards Institution (1955). B.S. 696.Google Scholar
British Standards Institution (1963). B.S. 1741.Google Scholar
Edwards, R. A. (1958). J. Dairy Res. 25, 9.CrossRefGoogle Scholar
Foot, A. S., Line, C. & Rowland, S. J. (1963). J. Dairy Res. 30, 403.CrossRefGoogle Scholar
Rook, J. A. F. (1961). Dairy Sci. Abstr. 23, 251.Google Scholar
Rook, J. A. F. (1964). Proc. Nutr. Soc. 23, 71.CrossRefGoogle Scholar
Rook, J. A. F. & Balch, C. C. (1961). Br. J. Nutr. 15, 361.CrossRefGoogle Scholar
Rook, J. A. F. & Campling, R. C. (1965). J. Dairy Res. 32, 45.CrossRefGoogle Scholar
Rook, J. A. F. & Rowland, S. J. (1959). 15th Int. Dairy Congr., London 1, 204.Google Scholar
Rowland, S. J. (1942–1944). J. Dairy Res. 13, 261.CrossRefGoogle Scholar
Waite, R. (1968). J. Dairy Res. 35, 407.CrossRefGoogle Scholar
Waite, R. & Blackbubn, P. S. (1957). J. Dairy Res. 24, 328.CrossRefGoogle Scholar