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Journal of Dairy Science Vol. 72 No. 8 2062-2073
© 1989 by American Dairy Science Association ®
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Impact of Noncorrosive Forage Stabilizers on Digestibility of Alfalfa Hay and Lactation Performance of Dairy Cows

D. A. Deetz1,2,, J. H. Harrison1,,3, F. R. Valdez1,2, and D. W. Evans4

Washington State University, Dairy Forage Facility, Puyallup 98371-4998

3 Corresponding author.

ABSTRACT

Four experiments examined the impact on digestibility of alfalfa hay and performance of dairy cows of applying a low acid stabilizer and a Lactobacillus fermentation product to moist hay. Treatments evaluated were alfalfa baled at: 15 to 20% moisture (dry control); 20 to 25% moisture with addition of 1.8 and 3.6 kg/909 kg of a low concentration acid or 77 ml/909 kg of a Lactobacillus fermentation product; and 20 to 25% moisture (wet control). In Experiments 1 and 3 (digestion trials), intake of DM by cows was not afifected by addition of forage stabilizers to moist hay. Digestibility of DM, ADF, cellulose, and nitrogen was similar for cows consuming dry control than for cows consuming moist forages. Digestibility of NDF was highest for cows consuming low concentration acid-treated forage compared with dry control or Lactobacillus fermentation product treated hay in one of two experiments. Digestibility of hemicellulose was highest for cows consuming low concentration acid-treated forage, intermediate for cows consuming Lactobacillus fermentation product treated hay, and lowest for cows consuming dry control hay in one of two experiments. Nitrogen retention was highest for cows consuming dry control hay compared with those consuming moist forages in one of two experiments. Milk production and milk components were unaffected by including moist hay treated with forage stabilizers in lactation diets. Lactating cows consuming stabilizer-treated forage gained more weight than cows consuming dry control hay in one of two experiments.

FOOTNOTES

1 Department of Animal Science, WSU Puyallup Research Extension Center, Puyallup 98371-4998.

2 Present address: Department of Animal Sciences, University of Minnesota, St. Paul 55108.

4 Department of Agronomy and Soils, WSU Prosser Irrigated Agriculture Research and Extension Center 99350-0030.




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