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Last Updated: August 13, 2007
An alkalizing agent (like sodium sesquicarbonate or magnesium oxide) raises the rumen pH (ammonia would also do this). A buffering agent (like sodium bicarbonate) attempts to maintain the rumen pH at its pKa which is 6.25 (when it dissociates).
Mike Hutjens, Extension Dairy Specialist, University of Illinois - Illini DairyNET
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