J. Anim Sci.
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J. Anim Sci. 1982. 54:713-718.
© 1982 American Society of Animal Science
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Effect of Ammoniation on the Refermentation of Corn Silage1

M. J. Glewen2 and A. W. Young2,3,

University of Wisconsin, Madison 53706

Abstract

The effects of anhydrous ammonia on the refermentation of corn silage exposed to air were determined by measuring fermentation in a series of silage filled boxes over a 7-d period. Applications of anhydrous ammonia at 1% of dry matter at time of ensiling enhanced stability of corn silage following aeration. Temperature of untreated silage increased 75% during the first 4 d of refermentation and reached a higher (P<.05) maximum temperature than the ammoniated silage (48.0 vs 20.8 C). Ammoniated silage did not increase in temperature during the 7-d period. Mean dry matter loss was less (P<.05) for the treated silage. Untreated silage pH increased (P<.05) from 3.75 to 5.51 while pH of treated silage remained nearly constant. Lactic acid levels were higher initially (P<.05) in the ammoniated silage and changed little during refermentation. However, lactic acid levels decreased by 75% in the untreated silage by d 7 and were still lower (P<.05) in comparison to treated silage. Acetic and propionic acid levels in the untreated silage increased by 138 and 78%, respectively and were higher (P<.05) in comparison to treated silage on d 7. Although neither silage showed large changes in ammonia N, increases (P<.05) in acid detergent insoluble N were observed in the untreated silage toward the end of the refermentation period.

Footnotes

1 Research supported by the College of Agricultural and Life Sciences, Project WIS02310. This is Paper No. 769 from the Dept. of Meat and Anim. Sci.

2 Dept. of Meat and Anim. Sci. Address for reprint requests.

3 Present address: Dept. of Anim. Industries, Southern Illinois Univ., Carbondale 62901.






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Copyright © 1982 by the American Society of Animal Science.