J. Anim Sci.
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J. Anim Sci. 1950. 9:354-362.
© 1950 American Society of Animal Science
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Some Relationships between Chemical Composition, Nutritive Value, and Intake of Forages Grazed by Steers and Wethers1

R. M. Forbes2 and W. P. Garrigus

Kentucky Agricultural Experiment Station

Abstract

The data reported in this paper represent a continuation and summary of experiments previously reported by Forbes and Garrigus (I948).Since the earlier publication, several papers bearing on this general subject have come to our attention. The literature on methods of measuring pastureforage intake have been thoroughly reviewed by SaltonstaU (I948). Extensive experiments have been reported by Homb (1946) on the relationship between roughage composition and its digestibility by lambs. Axelsson (I949) has summarized the relationships between composition of feeds and their digestibility, obtaining his data from Schneider's compilation (I946). Lancaster (i949) has proposed that fecal excretion of nitrogen be used as a tool for measurement of pasture-forage intake. The use of forage protein content as an indicator of digestibility has been investigated by Forbes (I950). Reid (1949) has reported the use of naturally occurring chromogenin a manner analogous to the lignin-ratio method for measuring digestibility and intake of forages. This method shows promise of being extremely useful.

Footnotes

1 The investigation reported in this paper is in connection with a project of the Kentucky Agricultural Experiment Station, and is reported by permission of the director.

2 Formerly, Associate Professor of Animal Husbandry, University of Kentucky; now Associate Professor of Animal Nutrition, University of Illinois.






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