J. Anim Sci.
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J. Anim Sci. 1971. 33:1097-1101.
© 1971 American Society of Animal Science
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Effects of Added Urea and Ammonium Polyphosphate on Fermentation of Corn Stover Silages1

V. F. Colenbrander, L. D. Muller2 and M. D. Cunningham

Purdue University, Lafayette, Indiana 47907

Abstract

Two separate trials were conducted with plastic laboratory silos to evaluate the chemical composition and fermentation characteristics of corn stover ensiled with various additives. Trial 1 examined the effects of four different levels of urea and ammonium polyphosphate (APP) on corn stover fermentation. Trial 2 examined the influence of increasing increments of a liquid supplement on stover silage fermentation.

In trial 1, addition of increasing increments of urea, and to lesser extent APP, produced a linear increase (P<.05) in crude protein content of the stover silage. Urea-N and ammonia-N levels tended to increase with increasing additions of both additives. Fermentation patterns of the stover silages, measured by pH, titratable acid and organic acid content, did not differ greatly between additives and were desirable in all instances. Additions of urea tended to improve IVDMD and improve structural composition of the stover as measured by CWC, ADF and ADL. In trial 2, the addition of increasing increments of a liquid supplement to corn stover improved crude protein content (linear, P<.01) while producing a desirable fermentation as measured by pH and acid production.

Footnotes

1 Purdue University Agricultural Experiment Station Journal Paper No. 4404. A contribution from the Department of Animal Sciences. Research supported in part by grant from Allied Chemical Corporation.

2 Present address: Department of Dairy Science, South Dakota State University, Brookings.






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Copyright © 1971 by the American Society of Animal Science.