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FAQ #25656

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What is the difference between an alkalizing agent, such as magnesium oxide, and a buffering agent, such as sodium bicarbonate, in terms of mode and site of action?

Related resource areas: Dairy

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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