What is the role of buffers in animal nutrition?

What is the role of buffers in animal nutrition?

• A. To raise ruminal 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 act as a source of protein

Answer: (B)

Buffers stabilize the rumen environment by neutralizing the hydrogen ions produced during microbial fermentation, especially from volatile fatty acids. This prevents the pH from dropping too far, keeping it within a range that supports fiber-digesting microbes. They don’t push pH up to neutral or alkaline levels, and they don’t neutralize every acid completely. They also aren’t a source of protein. That’s why the statement describing buffers as decreasing pH changes caused by VFAs without causing a large rise in ruminal pH is the best fit.

Buffers stabilize the rumen environment by neutralizing the hydrogen ions produced during microbial fermentation, especially from volatile fatty acids. This prevents the pH from dropping too far, keeping it within a range that supports fiber-digesting microbes. They don’t push pH up to neutral or alkaline levels, and they don’t neutralize every acid completely. They also aren’t a source of protein. That’s why the statement describing buffers as decreasing pH changes caused by VFAs without causing a large rise in ruminal pH is the best fit.