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Journal of Dairy Science Vol. 69 No. 11 2846-2854
© 1986 by American Dairy Science Association ®
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Effect of Adding Formaldehyde, Glutaraldehyde, or Dimethylolurea to Alfalfa before Ensiling1

L. Kung, Jr.2, W. M. Craig3, L. D. Satter and G. A. Broderick

US Dairy Forage Research Center, US Department of AGriculture, Agricultural Research Service, Madison, WI 53706

ABSTRACT

Formaldehyde, glutaraldehyde, or dimethylolurea were sprayed on alfalfa wilted to approximately 35 and 62% dry matter at rates of 1, 3, and 4 g of formaldehyde; 1.7, 5.0, and 6.7 g of glutaraldehyde; and 2.5, 5.0 and 10 g of dimethylolurea/100 g of crude protein. Treatment of alfalfa with formaldehyde resulted in marked inhibition of silage fermentation as characterized by large amounts of residual water-soluble carbohydrates and low amounts of lactic acid, free NH3-N, and amino acids. The effects with glutaraldehyde and dimethylolurea were similar but to a lesser extent. Addition of formaldehyde and glutaraldehyde resulted in similar reductions of rumen degradable nitrogen as estimated by in situ techniques. However, fiber digestion tended to be less for glutaraldehyde than formaldehyde silage. Addition of these additives to alfalfa containing 62% dry matter resulted in almost complete inhibition of silage fermentation. Presence of surface mold on the 62% dry matter-treated silages suggest that the silage was unstable.

FOOTNOTES

1 Portions of this data were originally presented at the 1983 Annual Meeting of the American Society of Animal Science, Pullman, WA.

2 Monsanto Co., Nutrition Chemicals Division, 700 Chesterfield Village Parkway, Chesterfield, MO 63198.

3 Louisiana State University, Department of Animal Science, Baton Rouge, LA 70803.






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Copyright © 1986 by the American Dairy Science Association ®.