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8.1 The Response of Dairy Cows in Early Lactation to Supplements of Protein given with Rations Designed to Promote Different Patterns of Rumen Fermentation

Published online by Cambridge University Press:  27 February 2018

J. A. Lees ,
P. C. Garnsworthy  and
J. D. Oldham
J. A. Lees
Affiliation:
University of Nottingham, School of Agriculture, Sutton Bonington, Loughborough, Leicestershire
P. C. Garnsworthy
Affiliation:
University of Nottingham, School of Agriculture, Sutton Bonington, Loughborough, Leicestershire
J. D. Oldham
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
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Extract

In recent years, it has become clear that the amount and type of protein included in diets for dairy cows are crucial factors determining milk production. On many occasions, milk production has been increased by increasing the protein content of the diet. On rather fewer occasions, milk production has been altered by changing the source of dietary protein. However, in all instances, it has been inferred that the milk production response is related to changes in the amounts of total amino acids reaching the small intestine.

No account has previously been taken of the extent to which these changes in milk production, consequent on changing protein inputs, depend on the nature of the basal diet although it is well established that the nature of diets, in particular their influence on the balance of fermentation end-products produced within the rumen, has a big influence on the partition of nutrient use between secretion in milk and deposition in tissue. This experiment was designed to measure the response of dairy cows to protein supplements given with diets designed to maintain widely different patterns of rumen fermentation.

Type
8. Theatre Presentations II
Information
BSAP Occasional Publication , Volume 6: Forage Protein in Ruminant Animal Production , 1982 , pp. 157 - 159
Copyright
Copyright © British Society of Animal Production 1982

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References

Ørskov, E. R., Reid, G. W., and McDonald, I. 1981. The effects of protein degradability and food intake on milk yield and composition in cows in early lactation. Br. J. Nutr. 45:547–555.CrossRefGoogle ScholarPubMed