Topics:
Animal Nutrition, Animal Refresher
Material Collected in a Metabolic Trial
In a metabolic trial, which material is used and collected for estimation?
- Urine only
- Faeces only
- Neither — only blood samples
- Both urine and faeces — Correct Answer
Explanation:
Correct Answer: Both urine and faeces
Metabolic trials collect both faeces and urine to calculate:
- Nitrogen balance: N intake − (N faeces + N urine) = N retained
- Metabolisable Energy (ME): GE − Faecal energy − Urinary energy − Methane energy
Why Urine is Essential
Urine contains protein catabolism end-products: urea, creatinine, allantoin (from microbial purine nucleotides). Without urine, total N excretion cannot be calculated.
Castrated males preferred — separate urinary and faecal excretion openings allow clean uncontaminated collection.
📚 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.
