J. Anim Sci.
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J. Anim Sci. 1979. 48:900-905.
© 1979 American Society of Animal Science
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Effect of Fat and Lecithin and of Moisture Levels of Corn and Corn Silage on Nutrient Digestibility by Ruminants1,2,3,

T. W. Perry and T. S. Stewart

Department of Animal Sciences, Purdue University, West Lafayette, IN 47907

Abstract

Six cattle and three lamb digestion trials were conducted to study the effect of 3% added fat on nutrient digestibility by ruminants. In addition, the effect of moisture levels of corn (11% vs 26%) and of corn silage (64% vs 50%) on nutrient digestibility by cattle was studied. Added fat depressed (P<.01) ash and protein digestibility while increasing (P<.01) fiber digestibility. These effects were more pronounced for fat in combination with low moisture silage. Lambs responded somewhat differently in that added fat decreased crude fiber digestibility (P<.01). Furthermore, the combination of 2% lecithin and fat resulted in no effect on crude fiber digestibility, but resulted in a decrease (P<.01) in protein digestibility.

High moisture corn nutrients were more (P<.01) digestible than those for low moisture corn, except for ash.

Digestibility of ash was lower (P<.01) for low moisture silage while digestibility of energy, NFE and ether extract were higher (P<.01) for low moisture silage. Dry matter, protein and crude fiber digestibility were unaffected by silage moisture level.

Footnotes

1 Journal Paper No. 6086 Purdue University Agricultural Experiment Station.

2 Supported in part by grants-in-aid from the A. O. Smith Harvestore Products. Inc., Arlington Heights, IL. and from the Fats and Proteins Research Foundation, Inc., 2720 Des Plaines Avenue, Des Plaines, IL 60018.

3 The author expresses appreciation to Ms. Alice Bales. J. W. Ward. W. H. Weatherly and I. Hagsten for technical assistance in these studies.






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