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What are the recommendations for the use of sodium bentonite as a buffer?

Last Updated: August 13, 2007

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Sodium bentonite is NOT a buffer, but it does swell up in the rumen and change rates of feed passage. Wisconsin researchers in the 1970s reported milk fat test benefits at a feeding rate of 5% of the grain mix. We do not recommend bentonite (a clay mineral) as a buffer. Stay with sodium bicarbonate or sodium sesquicarbonate at 0.75% of the ration dry matter.

Mike Hutjens, Extension Dairy Specialist, University of Illinois - Illini DairyNET

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