J. Anim Sci.
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J. Anim Sci. 1979. 49:826-831.
© 1979 American Society of Animal Science
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Interpretation and Significance of Nutrient Balance Experiments1

J. M. Asplund2,3,

Animal Science Research Center University of Missouri4, Columbia 65211

Abstract

Nutrient balance studies have been used extensively in nutritional research. Several problems of determination have been observed. These include errors in collection and sampling of feed and excreta, loss vectors not measured, correspondence of excreta collections and feed intake. Such errors usually result in overestimations of actual balance and render absolute values questionable. In addition, experimental design may influence results. Balance data are influenced by levels of other nutrients, growth rate, depletion status of the animals, adaptation periods, and other factors. Suggested guidelines for planning and interpretation of balance trials are presented.

Footnotes

1 Contribution from the Missouri Agr. Exp. Sta. Journal Series No. 8249. Approved by the director.

2 Invited paper given at Annual Meetings of ASAS, July, 1978, E. Lansing, MI.

3 Department of Animal Husbandry, 164 Animal Science Research Center, MO 65211.

4 Department of Animal Husbandry.






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Copyright © 1979 by the American Society of Animal Science.