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Purine derivatives excretion in sheep urine in relation to metabolizable energy and rumen degradable protein intake

Published online by Cambridge University Press:  24 November 2017

F.J. Giráldez ,
R. Peláez ,
E. Zorita  and
C. Valdés
F.J. Giráldez
Affiliation:
Dpto. de Producción Animal, Universidad de León, 24071. León.(Spain)
R. Peláez
Affiliation:
Dpto. de Producción Animal, Universidad de León, 24071. León.(Spain)
E. Zorita
Affiliation:
Dpto. de Producción Animal, Universidad de León, 24071. León.(Spain)
C. Valdés
Affiliation:
Dpto. de Producción Animal, Universidad de León, 24071. León.(Spain)
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Extract

Recently has been shown that allantoin or total purine derivatives excretion in urine are strongly related to the amount of purines reaching the small intestine (Chen et al., 1990; Balcells et al., 1992) and as consequence purine derivative output is propouse to be used as an index of microbial protein flow to small intestine.

Because energy and rumen degradable protein supplies are the main factors affecting rumen microbial growth, the effect of changes in rumen degradable protein supplies at different levels of ME intake on urinary excretion of purine derivatives was studied in this work.

Type
Ruminant Metabolism
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 186
Copyright
Copyright © The British Society of Animal Production 1993

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References

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