J. Anim Sci.
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J. Anim Sci. 1962. 21:189-192.
© 1962 American Society of Animal Science
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Digestibility Studies by Means of Chromic Oxide, Lignin and Total Collection Techniques with Sheep1

C. J. Elam2, P. J. Reynolds3, R. E. Davis2 and D. O. Everson4

U. S. Department of Agriculture

Abstract

A complete pelleted ration with chromic oxide included at 0.5% was fed to six sheep on an experiment of Latin square design. Comparison of dry matter digestibility as determined by the total collection, chromic oxide ratio, and lignin ratio methods, showed close agreement between coefficients determined by total collection and chromic oxide ratio methods; the lignin ratio method resulted in low coefficients. These results were obtained when total feces were collected from each sheep over 10-day periods. Coefficients determined from single-day feces samples by the chromic oxide ratio method agreed well with those obtained by the total collection method. The standard deviation of single day coefficients was only 1.10.

Chromic oxide recovery during the experiment averaged 100.7% lignin recovery 90.2%.

Footnotes

1 The authors express their appreciation to Ivan L. Lindahl Sheep, Goat and Fur Animal Research Branch, for his part in designing the series of experiments of which this is one part and to Walter R. Harvey, Biometrical Services, for his help and advice.

2 Beef Cattle Research Branch, Animal Husbandry Research Division, ARS, Agricultural Research Center, Beltsville, Maryland.

3 Sheep, Goat and Fur Animal Research Branch, Animal Husbandry Research Division, ARS, Beltsville, Maryland.

4 Biometrical Services, ARS, Agricultural Research Center, Beltsville, Maryland.






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