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Effect of increasing milk replacer crude protein content and feeding level on nitrogen output by bull calves pre-weaning

Published online by Cambridge University Press:  23 November 2017

H W F Wicks ,
R J Fallon ,
L E R Dawson ,
A Brown  and
J Twigge
H W F Wicks*
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down, United Kingdom
R J Fallon
Affiliation:
Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland
L E R Dawson*
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down, United Kingdom
A Brown
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down, United Kingdom
J Twigge
Affiliation:
Nutreco Ruminant Research Centre, 5830 AE Boxmeer, Netherlands
*
Email: lynne.dawson@dardni.gov.uk
Email: lynne.dawson@dardni.gov.uk
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Extract

Previously reported results indicated that feeding heifer calves more milk replacer increased growth rates in the pre-weaning period, but had little or no effect on plasma protein concentration. However, increasing the crude protein content of milk replacer from 230 to 300 g/kg, had no effect on growth rates but plasma total protein and plasma urea concentrations increased (Wicks et al. , 2005a, b). Kohn et al. (2005) showed that plasma urea was an indicator of nitrogen excretion. An experiment was therefore initiated to investigate the influence of level of milk replacer feeding and the crude protein content of the milk replacer on the nitrogen excretion of calves.

Type
Poster presentations
Information
Proceedings of the British Society of Animal Science , Volume 2006 , March 2006 , pp. 137
Copyright
Copyright © 2016 The American Society of International Law

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References

Kohn, R.A., Dinneen, M.M. and Russek-Cohen, E. (2005). Using blood urea nitrogen to predict nitrogen excretion and efficiency of nitrogen utilization in cattle, sheep, goats, horses, pigs and rats. Journal of Animal Science, 83: 879-889.CrossRefGoogle Scholar
Wicks, H.C.F., Fallon, R.J., Twigge, J. and Dawson, L.E.R. (2005a). Effect of altering the protein intake of autumn-born Holstein-Friesian calves on calf performance. Proceedings of the British Society of Animal Science. 2005, p. 193.CrossRefGoogle Scholar
Wicks, H.C.F., Fallon, R.J., Twigge, J. and Dawson, L.E.R. (2005b). The influence of feeding level and milk replacer protein content on growth and blood protein levels of Holstein-Friesian calves. Euopean Association of Animal Production Annual Meeting. 2005 (in press) Google Scholar