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A comparison of the voluntary intake and digestibility by beef cows of diets based on oat straw and supplemented with different forms of non-protein nitrogen

Published online by Cambridge University Press:  02 September 2010

G. Fishwick ,
J. J. Parkins ,
R. G. Hemingway  and
N. S. Ritchie
G. Fishwick
Affiliation:
Glasgow University Veterinary School, Bearsden, Glasgow
J. J. Parkins
Affiliation:
Glasgow University Veterinary School, Bearsden, Glasgow
R. G. Hemingway
Affiliation:
Glasgow University Veterinary School, Bearsden, Glasgow
N. S. Ritchie
Affiliation:
Glasgow University Veterinary School, Bearsden, Glasgow
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Abstract

Pregnant beef cows were given 2 kg barley per day and oat straw ad libitum. The digestibility of the organic matter of the diet was approximately 53% when urea included in the barley was given in one or four feeds per day. Supplementation of the barley with di-ureido isobutane improved the organic matter digestibility to 56·7%. When a solution containing urea, phosphorus, calcium and sodium was included in the straw the digestibility of the diet was 59·0%. These improved digestibilities were not associated with any differences in the concentrations of ammonia in the rumen liquor or blood of the cows.

Type
Research Article
Information
Animal Production , Volume 26 , Issue 2 , April 1978 , pp. 135 - 141
Copyright
Copyright © British Society of Animal Science 1978

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References

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