J. Anim Sci.
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J. Anim Sci. 1969. 29:769-772.
© 1969 American Society of Animal Science
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Chemical Characteristics of in vitro Corn Silages1

R. J. Condon2, I. M. Brookes3, U. S. Garrigus, E. E. Hatfield and F. C. Hinds

University of Illinois,4 Urbana

Abstract

The influence of several nitrogen and calcium sources on in vitro corn silage fermentation at room temperature or buried in fermenting silage was investigated. The measured characteristics were not greatly influenced by these different fermentation temperatures. As measured by the accumulation of fermentation end-products, 8 days of ensiling appeared to be sufficient for analytical comparison of effects of most additives. However, apparent loss of dry-matter continued beyond 8 days as did the accumulation of lactic acid with certain additions, particularly cyanuric acid.

The addition of urea resulted in a greater decrease in pH than did either the addition of biuret, cyanuric acid or the control silage. This was due mainly to the higher initial pH value associated with the addition of urea. The addition of limestone resulted in a greater drop in pH than when CaSO4 was added. No effect due to the additives tested was apparent in either dry-matter losses or crude protein changes. The addition of urea or cyanuric acid was associated with a greater increase in the content of SDA than when biuret was added. A higher final concentration of lactic acid was noted in corn silage with added urea than with added cyanuric acid or with no nitrogen addition. Addition of biuret to corn silage resulted in greater lactic acid production than did addition of cyanuric acid. Addition of limestone to corn silage resulted in greater lactic acid production than did addition of CaSO4

Footnotes

1 Supported in part by Grants-in-Aid from Dow Chemical Company, Midland, Michigan, and Moorman Manufacturing Company, Quincy, Illinois.

2 NIH trainee, nutritional sciences training grant GMOO653.

3 University of Illinois Fellow.

4 Animal Science Denartment.






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