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What is the relationship between increasing starch digestion in the grain of silage and acidosis problems occurring? Do you believe you can get to a point where increasing corn digestion is no longer viable due to the fact that it also increases acidosis? As starch digestion goes up, does the pH decrease to stop fiber digestion?
Last Updated: August 20, 2007
If ruminal starch digestion in corn silage increases, the potential for acidosis increases if rumen pH is lowered. A lowering of rumen pH below 6.0 may have negative effects on fiber digestion. A drop in ruminal pH is related to the amount of fermentable sugars and starch consumed and the rate of starch digestion. In a situation where the starch digestibility in corn silage is high, the amount of starch from grain in the diet can be lowered to minimize this effect. This situation is a positive effect of good forage quality as it allows for more forage to be fed and still maintain good production.
Mike Hutjens, Extension Dairy Specialist, University of Illinois - Illini DairyNET
Robert Van Saun, Extension Veterinarian, Penn State University
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