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Ammonia-Treated Corn Silage for Dairy Cattle¹

Department of Dairy Science, Michigan State University, East Lansing 48823

ABSTRACT

The feeding value of corn silage treated with an ammonia solution at ensiling was compared with that of urea-treated and control silages in dairy cattle rations. On all-silage rations with no protein supplement, heifers ate more (P < .05) of the ammoniated than the control silage indicating a superior protein nutriture. Lactating cows showed higher milk yields for cows fed ammonia- and urea-treated silages than for negative control rations with no added nitrogen. No significant differences in production were noted for cows fed control, urea-treated, or ammoniated silages at equal dietary nitrogen.

Ammonia treatment resulted in higher concentrations in silages of lactic acid and water insoluble nitrogen than did urea treatment, probably because the ammonia exerts a buffering action and extends the period of microbial fermentation in the silo.

¹ Published with the approval of the Director of the Agricultural Experiment Sation as Journal

² Present address: Institute for Agricultural Besearch, State of Pernambuco Recife, PE., Brazil.