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The effect of feeding in early lactation on feed intake, yields of milk, fat and protein and on live-weight change over one lactation cycle in dairy cows

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

An experiment has been made to study the effect of level of feeding in early lactation on the feed intake, yields of milk, fat and protein and on live-weight change over one lactation cycle. Adult British Friesian cows of high potential yield were randomly allocated to high (HP) or moderate (MP) levels of feeding for 20 weeks. They were then randomly allocated within treatments to controlled or ad libitum levels of feeding for the rest of the lactation.

There were significant effects of feeding in the early part of lactation on the yields of milk, protein and lactose but not on milk fat or live-weight change. Cows on the MP treatment produced about 450 kg milk from body energy reserves but were unable to supplement fully the dietary energy deficiency. There was no significant response to feeding ad libitum in the second part of lactation and the differences in yields established in the first part were maintained in the second. There was no relationship between feed intake and milk yield for cows fed ad libitum nor did the level of feeding in early lactation influence the level of intake in the later part.

There was little agreement between calculated energy balance and the live-weight changes but there was more between live-weight change and condition score.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 3 , December 1984 , pp. 629 - 637
Copyright
Copyright © Cambridge University Press 1984

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References

Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock: Technical Review 2nd edn. Farnham Royal: Commonwealth Agricultural Bureaux.Google Scholar
Alderman, G., Broster, W. H., Strickland, M. J. & Johnson, C. L. (1981). The energy value of liveweight changes in the lactating dairy cow. 32nd Annual Meeting of the European Association for Animal Production, Zagreb.Google Scholar
Blaxter, K. L. (1956). Starch equivalents, ration standards and milk production. Proceedings of the British Society of Animal Production, pp. 3–31.Google Scholar
Broster, W. H. & Broster, V. J. (1984). Review of the progress in Dairy Science: long terra effects of plane of nutrition on the performance of the dairy cow. Journal of Dairy Research 51, 149–196.Google Scholar
Johnson, C. L. (1983a). Influence of feeding pattern on the biological efficiency of high-yielding dairy cows. Journal of Agricultural Science, Cambridge 100, 191–199.Google Scholar
Johnson, C. L. (1983b). The effect of level and pattern of feeding on the yield of milk constituents from cows of different potential. Journal of Agricultural Science, Cambridge 101, 717–726.Google Scholar
Lucas, H. L. (1943). A method of equalised feeding for studies with dairy cows. Journal of Dairy Science 26, 1011–1022.CrossRefGoogle 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
Mulvany, R. (1977). Dairy cow condition scoring. Paper No. 4468, National Institute for Research in Dairying, Reading.Google Scholar
Rook, J. A. F., Line, C. & Rowland, S. J. (1960). The effect of the plane of energy nutrition of the cow during the late-winter period on the change in the solids-not-fat content of milk during the spring grazing period. Journal of Dairy Research 27, 427—433.Google Scholar
Tyrrell, H. F. & Reid, J. T. (1965). Prediction of the energy value of cow's milk. Journal of Dairy Science 48, 1215–1223.Google Scholar
Wainman, F. W. & Dewey, P. J. S. (1984). ME values of cereal straws. Feedingstuffs Evaluation Unit report, Rowett Research Institute, Bucksburn, Aberdeen.Google Scholar