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The effect of level and frequency of concentrate feeding on the performance of dairy 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

An experiment has been made using adult lactating cows in a randomized block design to study the effectiveness of basing feeding during the first 20 weeks of lactation on yield predicted from that obtained during the 8–12th days of lactation. Cows were classified as high yielding (HY) or low yielding (LY). The levels of feeding were identical within each yield group during the first 8 weeks of lactation but during the 9th to the 20th week two different levels of concentrate feed (HP and LP) were used. Over the 20-week period concentrates were offered in two or five daily feeds. Thus the effect of two levels and two frequencies of feeding on feed intake, milk yield and composition, and on live-weight change were studied.

Cows in the HY group achieved a mean daily peak yield 2·6 kg higher than predicted while those in the LY group achieved the predicted mean peak daily yield. There was no significant effect of level of feeding on the 20-week milk yield but there was a significant effect on the yield of the LYLP class in weeks 9–20. Frequency of feeding had no significant effect on yield in either high-low-yielding cows. There was no significant effect of level of feeding on milk composition but low-yielding cows gave milk with a higher fat percentage than high-yielding cows. Five-times-a-day feeding also produced milk with a higher fat percentage than twice-a-day feeding.

Live-weight changes were small and the largest variation was recorded in highyielding cows.

The number of days from calving to first service was not significantly different for the two yield groups but there was a significant effect of level of feeding.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 92 , Issue 3 , June 1979 , pp. 743 - 751
Copyright
Copyright © Cambridge University Press 1979

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References

REFERENCES

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock, No. 2, Ruminants. London: Agricultural Research Council.Google Scholar
Anon. (1975). Energy allowances and feeding systems for ruminants. Technical Bulletin 33, Ministry of Agriculture Fisheries and Food. London: H.M.S.O.Google Scholar
Blaxter, K. L. (1966). The feeding of dairy cows for optimal production. George Scott Robertson Memorial Lecture, Queen's University of Belfast, 11 1966.Google Scholar
Broster, W. H. (1972). Effect on milk yield of the cow of the level of feeding during lactation. Dairy Science Abstracts 34, 265–288.Google Scholar
Broster, W. H. (1974). Biennial Review of the National Institute for Research in Dairying, p. 18.Google Scholar
Broster, W. H., Broster, , Valerie, J., Smith, T. & Siviter, J. W. (1975). Experiments on the nutrition of the dairy heifer. IX. Food utilization in lactation. Journal of Agricultural Science, Cambridge 84, 173–186.Google Scholar
Broster, W. H., Broster, , Valerie, 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
Burt, A. W. A. & Dunton, R. C. (1976). Effects of frequency of feeding upon food utilization by ruminants. Proceedings of the Nutrition Society 26, 181–190.Google Scholar
Evans, R. E. (1960). Rations for livestock. Bulletin 48, Ministry of Agriculture, Fisheries and Food. London: H.M.S.O.Google Scholar
Gardner, R. W. (1969). Interactions of energy levels offered to Holstein cows pre partum and post partum. 1. Production responses and blood composition changes. Journal of Dairy Science 52, 1973–1984.Google Scholar
Gordon, F. J. (1976). Effect of concentrate level and stocking rate on performance of dairy cows calving in later winter. Animal Production 22, 175–197.Google Scholar
Gordon, F. J. (1977). The effect of three concentrate input levels on performance of dairy cows calving during mid-winter. Animal Production 25, 373–379.Google 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
McCaffree, J. D. & Merrill, W. G. (1968). Effects of feeding concentrates to maintain body weight of dairy cows in early lactation. Journal of Dairy Science 51, 561–566.Google Scholar
Mochrie, R. D., Thomas, W. E. & Lucas, H. L. (1956). Influence of frequency of feeding equalised intakes on animal responses. Journal of Animal Science 15, 1256.Google Scholar
Rowell, J. G. & Walters, D. E. (1976). Analysing data with repeated observations on each experimental unit. Journal of Agricultural Science, Cambridge 87, 423–432.CrossRefGoogle Scholar
Tyrrell, H. F. & Reid, J. T. (1965). Prediction of the onergy value of cow's milk. Journal of Dairy Science 48, 1215–1223.CrossRefGoogle ScholarPubMed