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Influence of feeding pattern on the biological efficiency of high-yielding 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 the pattern of distribution of a fixed amount of production compound on milk yield, milk composition and live-weight change in the first 20 weeks of lactation and any carry-over effects on performance in the remaining part. Adult British Friesian cows of predicted high yield potential were randomly allocated to a graded (G) or flat-rate (F) system of feeding.

There was no significant effect of treatment on milk yield, milk composition or yield of milk constituents in the experimental period or in the whole lactation.

Live-weight changes were not significantly different between treatments at any stage of lactation. Calculated energy balances showed losses until the 4th week of lactation. Thereafter positive balances occurred but it was not until the 9th week for treatment G and the 15th week for treatment F that the original zero balance was restored. The total balance was in good agreement with live-weight gain for treatment F but not for treatment G.

Calculated efficiencies of utilization of metabolizable energy for milk production (Klo) were variable throughout lactation and lower than the currently accepted standards.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 100 , Issue 1 , February 1983 , pp. 191 - 199
Copyright
Copyright © Cambridge University Press 1983

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References

Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock. 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.CrossRefGoogle Scholar
Broster, W. H. (1972). Effect on milk yield of the cow of level of feeding during lactation. Dairy Science Abstracts 34, 265–288.Google Scholar
Broster, W. H. & Thomas, C. (1981). The influence of level and pattern of concentrate input on milk Biological efficiency of dairy cows 199 output. In Recent Advances in Animal Nutrition (ed. Haresign, W., pp. 49–69). London: Butterworths.CrossRefGoogle Scholar
Johnson, C. L. (1977). The effect of the 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
Milk Marketing Board (1981). Report of the Breeding and Production Organisation No. 31, 1980–1981. Thames Ditton: Milk Marketing Board.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
Trigg, T. E. & Topps, J. H. (1981). Composition of body-weight change during lactation in Hereford × British Friesian cows. Journal of Agricultural Science, Cambridge 97, 147–157.CrossRefGoogle Scholar
Tyrrell, H. F. & Reid, J. T. (1965). Prediction of the energy value of cow's milk. Journal of Dairy Science 48, 1215–1223.CrossRefGoogle ScholarPubMed
van Es, A. J. H. & van der Honig, Y. (1979). Energy Utilization in Feeding Strategy for the High Yielding Dairy Cow. St Albans: Granada Publishing Ltd.Google Scholar