J. Anim Sci.
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J. Anim Sci. 1951. 10:244-250.
© 1951 American Society of Animal Science
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A Comparison of the Relative Accuracy between Seven-Day and Ten-Day Collection Periods in Digestion Trials1

George E. Staples and W. E. Dinusson2

South Dakota State College Agricultural Experiment Station

Abstract

Coefficients of apparent digestibility were calculated from data secured from seven- and ten-day collection periods during twenty-seven individual trials. Relative accuracy was compared between the two lengths of periods by using coefficients of apparent digestibility and calculating loss in efficiency between the coefficients from seven- and ten-day periods. Loss in efficiency for the coefficients of the nutrients studied were less than 2 percent in all cases except that of nitrogen-free extract which showed an efficiency loss of 6.83 percent. Because of the nature of the analyses in determining nitrogen-free extract, it is difficult to evaluate and interpret the significance of the decreased efficiency encountered here.

The degree of accuracy secured by the seven-day collection period may be sufficient for many studies of apparent digestibility. With a possible exception in the case of nitrogen-free extract the seven-day collection period gave coefficients comparable in accuracy to the ten-day collection period.

Footnotes

1 Contribution from Animal Husbandry Department and approved for publication by the Director of the Agricultural Experiment Station Number 245 of the Journal Series.

2 Present Addresses: Colorado A & M College, Ft. Collins, Colo, and North Dakota Agr. Exp Sta., Fargo, North Dakota, respectively.






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Copyright © 1951 by the American Society of Animal Science.