Topics:
Animal Nutrition, Animal Refresher
VFA Production Parameters
Which is true about VFA production in ruminants?
- The total VFA concentration varies from 80 to 120 mEq/Litre of rumen liquor.
- Total VFA produces at the rate of 4 kg per day in an adult cow.
- Acetate is produced in maximum concentration.
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
All three statements about VFA production in ruminants are physiologically accurate: (1) total VFA concentration is 80–120 mEq/litre of rumen liquor, (2) adult cows produce approximately 4 kg VFA/day, and (3) Acetate is produced in maximum concentration (65% of total VFAs).
Rumen VFA Production — Key Parameters
| Parameter | Value |
|---|---|
| Total VFA concentration in rumen | 80–120 mEq/litre of rumen liquor |
| Total VFA production in adult cow | ~4 kg/day |
| VFA profile (Acetate : Propionate : Butyrate) | 65 : 20 : 10 (on high roughage diet) |
| Energy contribution of VFAs | ~70% of ruminant's total energy needs |
Functions of Individual VFAs
- Acetate (65%) → milk fat synthesis; peripheral tissue oxidation for energy.
- Propionate (20%) → gluconeogenesis → milk sugar (lactose) synthesis.
- Butyrate (10%) → converted to β-hydroxybutyrate by rumen epithelium (ketone body).
Why Other Options Are Wrong
- Each individual statement (a, b, c) is factually correct — therefore All the above is the only complete answer.
📚 About this Topic — Animal Nutrition
This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.
