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The effect of level and pattern of feeding on the yield of milk constituents from cows of different yield potential

Published online by Cambridge University Press:  27 March 2009

C. L. Johnson
C. L. Johnson
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds, LS2 9JT
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Summary

Data from three dairy-cow nutrition experiments have been analysed in terms of the yields of milk, lactose, fat and protein. Yields of the three constituents varied linearly with milk yield. However, yields of fat from individual cows were much more variable at high milk yields than were the other two constituents. Patterns of feeding had relatively little effect on the pattern of protein yield in cows fed to their production potential but could be important in influencing yields of fat.

Predicted responses of protein and fat yields to increments of feed were generally small in cows being fed according to their predicted yield potential and the conversion of metabolizable energy to milk constituents was of a low biological efficiency.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 101 , Issue 3 , December 1983 , pp. 717 - 726
Copyright
Copyright © Cambridge University Press 1983

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References

Broster, W. H., Broster, V. J. & Smith, T. (1969). Experiments on the nutrition of the dairy heifer. VIII. Effect on milk production of level of feeding at two stages of lactation. Journal of Agricultural Science, Cambridge 72, 229–245.CrossRefGoogle Scholar
Broster, W. H., Sutton, J. D. & Bines, J. A. (1978). Concentrate: forage ratios for high yielding dairy cows. In 12th Nutrition Conference for Feed Manufacturers (ed. Haresign, W. and Lewis, Dyfed). London: Butterworth, 1979.Google Scholar
Broster, W. H. & Thomas, C. (1981). The influence of level and pattern of concentrate input on milk output. In Recent Advances in Animal Nutrition (ed. Haresign, W.). London: Butterworth, 1982.Google Scholar
Evans, R. E. (1960). Rations for livestock. Bulletin 48, Ministry of Agriculture, Fisheries and Food. London: H.M.S.O.Google Scholar
Gordon, F. J. (1976). Effects of concentrate levels and stocking rate on performance of dairy cows calving in late winter. Animal Production 22, 175–187.Google Scholar
Johnson, C. L. (1977). The effect ofthe plane and pattern of concentrate feeding on milk yield and composition in dairy cows. Journal of Agricultural Science, Cambridge 88, 79–94.CrossRefGoogle Scholar
Johnson, C. L. (1979). The effect of level and frequency of concentrate feeding on the performance of dairy cows of different yield potential. Journal of Agricultural Science, Cambridge 92, 743–751.CrossRefGoogle Scholar
Johnson, C. L. (1983). Influence of feeding pattern on the biological efficiency of high-yielding dairy cows. Journal of Agricultural Science, Cambridge 100, 191–199.CrossRefGoogle Scholar
Mcdonald, P., Edwards, R. A. & Greenhaloh, J. F. D. (1981). Animal Nutrition, 3rd edn, p. 320. Burnt Mill, Harlow, Essex: Longman Group.Google Scholar
Ministry Of Agriculture, Fisheries And Food (1975). Energy Allowances and Feeding Systems for Ruminants. Technical Bulletin, no. 33. London: H.M.S.O.Google Scholar
Rook, J. A. F. (1961). Variation in the chemical composition of the milk of the cow. Dairy Science Abstracts 23, 251–258.Google Scholar
Wright, J. A. (1970). The effect of energy undernutrition in the cow on the solids-not-fat content of her milk. Ph.D. thesis, University of Leeds.Google Scholar