In a healthy ruminant, most microbial protein is synthesized from ammonia together with:
Correct answer: D. Fermentable carbohydrates
- A. Undigested plant lignin
- B. Dietary mineral salts
- C. Absorbed fatty acids
- D. Fermentable carbohydrates
Explanation
Rumen microbes use ammonia as a nitrogen source and fermentable carbohydrates as energy and carbon sources. Lignin is poorly fermented, while absorbed fatty acids do not serve as the main substrate for this process.
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About Animal Nutrition and Feeding
Covers carbohydrates, proteins, lipids, minerals, vitamins and water, along with digestion, absorption and energy metabolism in domestic animals. Questions involve feed evaluation, nutrient requirements, ration formulation, forage and concentrate feeds, deficiency disorders, and the differences between ruminant and monogastric nutrition.
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