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Effect of diet on dairy cow nitrogen balance and live weight change during the dry period

  • J.M. Moorby (a1), S. Miles (a2), R.T. Evans (a2), W.J. Fisher (a2) and D.W.R. Davies (a2)...


Increases in yields of milk and milk protein have been observed from dairy cows offered a high protein supplement during the dry period (Van Saun et al., 1993; Moorby et al., 1994). One possible mechanism for this is a decrease in the mobilisation of maternal body protein to support foetal growth as more dietary protein is supplied and used for this purpose. This experiment was designed to investigate the effect of offering diets differing in protein concentration on whole body nitrogen balance in dairy cows and change in live weight (LW) and condition score (CS) over the dry period.



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Bell, A.W., Slepetis, R. and Ehrdardt, R.A. 1995. Growth and accretion of energy and protein in the gravid uterus during late pregnancy in Holstein cows. Journal of Dairy Science 78: 19541961.
Dewhurst, R.J., Davies, D.W.R., Fisher, W.J. and Aston, K. 1996. Effects of dry period diet on feed intake, body composition and subsequent lactational performance of dairy cows. Proceedings of the British Society of Animal Science winter meeting, Scarborough, 18-20 March 1996.
Moorby, J.M., Dewhurst, R.J. and Marsden, S. 1994. Effects of supplementary protein in the dry period on milk production in the subsequent lactation. Proceedings of the Nutrition Society 53: 215A.
Van Saun, R.J., Idleman, S.C. and Sniffen, C.J. 1993. Effect of undegradable protein amount fed prepartum on postpartum production in first lactation Holstein cows. Journal of Dairy Science 76: 236244.
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Proceedings of the British Society of Animal Science
  • ISSN: 1752-7562
  • EISSN: -
  • URL: /core/journals/proceedings-of-the-british-society-of-animal-science
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