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Further observations on the effect of protein upon roughage digestion in cattle



Further observations on the effect of protein upon roughage digestion in cattle



Journal of Animal Science 8(1): 9-18



A further and more detailed study was made upon the favorable influence of protein upon roughage digestion in cattle. Five series of digestion trials were conducted using 4 Hereford steers. Protein levels were varied by substituting dried skimmilk for mineralized starch in 3 series in which clover hay or corn cobs constituted the roughage portions of the ration. In the 4th and 5th series, ration protein was varied by adding skimmilk powder directly to corn cobs in one instance, and to a constant mixture of corn cobs and starch in the other. Improvement in roughage digestion accompanying skimmilk additions resulted in every series where starch formed a part of the ration. Contrary to this finding, skimmilk additions to roughage fed in rations containing no starch had little or no favorable influence. The conclusion was drawn that the protein requirement for efficient roughage digestion in cattle is extremely low when roughages are fed in the absence of starchy grains. When starch forms a part of the ration the need for protein supplement is increased in maintaining efficient roughage digestion.

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Accession: 013718840

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PMID: 18111900


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