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Variations in the urinary excretion of purine derivatives and creatinine in holstein/friesan dairy cattle

Published online by Cambridge University Press:  20 November 2017

K.J. Shingfield ,
N.W. Offer  and
A.M. Sword
K.J. Shingfield
Affiliation:
SAC, Grassland and Ruminant Science Department, Auchincruive, Ayr, KA6 5HW
N.W. Offer
Affiliation:
SAC, Grassland and Ruminant Science Department, Auchincruive, Ayr, KA6 5HW
A.M. Sword
Affiliation:
Scottish Agricultural Statistics Services, Auchincruive, Ayr, KA6 5HW
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Extract

The urinary excretion of purine derivatives has been proposed as a non-invasive method of estimating the outflow of rumen microbial protein. Wider application of this technique is hindered by the requirement for a total urine collection, but Chen et al. (1992) suggested the use of urinary Creatinine(C) concentration to account for changes in urine volume. The relative concentrations of Purine Derivatives (PD) and C in spot urine samples could be used as a suitable index of PD output. The following experiment assesses the validity of this approach in lactating Holstein/Friesan cattle.

Type
Ruminant Nutrition
Information
Proceedings of the British Society of Animal Science , Volume 1995 , March 1995 , pp. 18
Copyright
Copyright © The British Society of Animal Science 1995

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References

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