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The effects of grinding, either with or without NaOH treatment, on the utilization of straw by yearling dairy cattle

Published online by Cambridge University Press:  27 March 2009

T. Smith ,
W. H. Broster ,
Valerie J. Broster  and
J. W. Siviter
T. Smith
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
W. H. Broster
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
Valerie J. Broster
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
J. W. Siviter
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
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Summary

Processed straw, both ground and ground–NaOH treated, has been compared with long straw in diets of straw and concentrates fed to yearling dairy heifers. Protein allowances were varied by the addition of fishmeal.

Improved growth rate was consistently observed with those animals receiving fishmeal. When a fixed amount of barley straw was offered neither digestibility nor growth was affected by the form of the straw. With wheat straw grinding–NaOH treatment resulted in increased growth when fed in diets containing some long roughage. Voluntary intake of straw was additively increased by grinding and by treatment with 5% (w/w) NaOH. Ground-NaOH treatment of straw increased in vitro digestibility.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 96 , Issue 1 , February 1981 , pp. 159 - 165
Copyright
Copyright © Cambridge University Press 1981

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