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Effect of undegradable protein given for six weeks before calving on the performance of dairy cows in the subsequent lactation

Published online by Cambridge University Press:  05 November 2021

R.J. Dewhurst
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Dyfed SY23 3EB, UK
D.W.R. Davies
Affiliation:
Institute of Grassland and Environmental Research, Trawsgoed Research Farm, Trawsgoed, Dyfed SY23 4LL, UK
W.J. Fisher
Affiliation:
Institute of Grassland and Environmental Research, Trawsgoed Research Farm, Trawsgoed, Dyfed SY23 4LL, UK
K. Aston
Affiliation:
Institute of Grassland and Environmental Research, Trawsgoed Research Farm, Trawsgoed, Dyfed SY23 4LL, UK
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Extract

Previous studies (Moorby et al, 1994) have shown increased yields of protein and lactose in the subsequent lactation as a consequence of feeding additional undegradable dietary protein (UDP) and restricting energy intake during the dry period. This experiment was undertaken to investigate the effect of supplementary UDP in the dry period diet of Holstein-Friesian cows given unrestricted access to grass silage and 1.5 kg of barley per day.

Sixty-one cows received diets based on ad libitum access to grass silage with either (a) 1.5 kg barley / day or (b) 1.0 kg barley and 0.5 kg Maize Gluten Meal / day. After calving, cows had ad libitum access to grass silage (Metabolisable Energy (ME)=11.3 MJ/kg DM; crude protein (CP)=181 g/kg DM) and received 5 kg/day of concentrates (ME=13.0 MJ/kg DM; CP=250g/kg DM).

Type
Dairy
Copyright
Copyright © The British Society of Animal Science 1996

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References

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 51: 251A Google Scholar

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