What is the primary function of buffers in ruminant diets?

What is the primary function of buffers in ruminant diets?

• A. To raise pH above 7
• B. To decrease pH caused by volatile fatty acids without major increases in ruminal pH
• C. To neutralize all acids completely
• D. To provide additional protein

Answer: (B)

Buffers stabilize rumen pH by resisting changes caused by fermentation acids. As microbes break down feed, volatile fatty acids accumulate and tend to lower the pH. Buffers provide weak bases (like bicarbonate and phosphate) that neutralize these acids, forming salts and reducing the acidity. This keeps the rumen from dropping too far while not pushing the pH to unusually high levels. They aren’t meant to neutralize every acid completely or to supply protein; their main role is maintaining a stable, favorable pH for microbial activity.

Buffers stabilize rumen pH by resisting changes caused by fermentation acids. As microbes break down feed, volatile fatty acids accumulate and tend to lower the pH. Buffers provide weak bases (like bicarbonate and phosphate) that neutralize these acids, forming salts and reducing the acidity. This keeps the rumen from dropping too far while not pushing the pH to unusually high levels. They aren’t meant to neutralize every acid completely or to supply protein; their main role is maintaining a stable, favorable pH for microbial activity.