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Chemical Composition of Urea-Treated Corn Silage Containing Added Dried Whey or Whey Products¹

Dairy Science Department, South Dakota State University, Brookings 57006

ABSTRACT

Dried whole whey, partially delactosed whey, or lactose were added at two percents (1 and 2% dried whole whey equivalent) to corn silage and .5% urea-treated corn silage and .5% urea-treated corn silage in laboratory silos. Additions of whey products reduced nonprotein nitrogen and ammonia nitrogen in urea-treated corn silage. Dried whey was most effective in reducing ammonia nitrogen while lactose was least effective. This reduction in ammonia nitrogen with no change in total nitrogen indicated that additions of whey products to urea-treated corn silage may have added to the corn silage. Amount of addition of whey products did not influence results. Acid detergent fiber was slightly reduced by all additions and was lowest in corn silages with added lactose. Lactic acid, acetic acid, and pH were higher in corn silages containing urea but were not affected by additions of whey products.

¹ Published with the approval of the director of the South Dakota Agricultural Experiment Station as publication 1300 of the Journal Series.