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Intensive beef production: 10. Replacement of cereals with chopped straw

Published online by Cambridge University Press:  02 September 2010

M. Kay ,
A. Macdearmid  and
N. A. MacLeod
M. Kay
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
A. Macdearmid
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
N. A. MacLeod
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Summary

1. Two growth trials and a digestibility trial were carried out with 48 Friesian steers given diets containing approximately 5, 20, 35 and 50% chopped barley straw and concentrates up to 100%.

2. Rates of live-weight gain between 130 and 400 kg declined from 1·18 to 0·65 kg/day and carcass gain declined from 0·62 to 0·30 kg/day as the straw content of the diet increased from 5 to 50%.

3. Alimentary tract ‘fill’ increased from 10·5% of live weight with 5% straw to 21% of live weight with 50% straw, and killing-out percentage dropped from 55·5% to 48·3%.

4. Both dry-matter digestibility and apparent nitrogen digestibility were lowest for the diet with 50% straw.

Type
Research Article
Information
Animal Production , Volume 12 , Issue 2 , May 1970 , pp. 261 - 266
Copyright
Copyright © British Society of Animal Science 1970

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References

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