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Journal of Dairy Science Vol. 85 No. 2 434-444
© 2002 by American Dairy Science Association ®
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Corn Silage Management: Effects of Maturity, Inoculation, and Mechanical Processing on Pack Density and Aerobic Stability

L. M. Johnson 1, J. H. Harrison 1, D. Davidson 1, W. C. Mahanna 2, K. Shinners 3, and D. Linder 4

1 Department of Animal Sciences, Washington State University, Puyallup, 98371
2 Pioneer Hi-Bred International, Des Moines, IA, 50131
3 Department of Biological System Engineering, University of Wisconsin, Madison, 53706
4 Ag Bag International Ltd., Warrenton, OR, 97146

Three experiments were conducted to evaluate the effects of inoculation, maturity, and mechanical processing of corn silage on aerobic stability and pack density. Corn silage was stored in 20-L mini silos for the three aerobic stability experiments. Corn silage was stored in 80-L mini silos for the three pack-density experiments. The wet pack density of corn silage tended to decrease as maturity advanced in all of the pack-density experiments, and processed corn silage had a greater wet pack density compared with unprocessed corn silage in two of the three 20-L mini silo experiments. Aerobic stability, measured as the number of hours to reach 1.7°C above ambient, was greater for processed corn silage in two of the three 20-L mini silo experiments, and was greater for inoculated corn silage across the three 20-L mini silo experiments. Inoculation of corn silage with lactic acid producing bacteria tended to improve aerobic stability of corn silage more than maturity and mechanical processing.

Key Words: corn silage • mechanical processing • pack density • aerobic stability

Submitted on January 31, 2001
Accepted on October 4, 2001




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