Abstract
SUMMARYProcessed 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.
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