Topics:
Animal Nutrition, Animal Refresher
TDN Percentage of Cotton Seed Cake
The TDN (Total Digestible Nutrients) percentage in cotton seed cake is:
- 60%
- 70%
- 80% — Correct Answer
- 90%
Explanation:
Correct Answer: 80%
Cotton seed cake has a TDN of 80%, making it a high-energy protein concentrate.
Anti-Nutritional Factor in Cotton Seed Cake
Gossypol is the toxic anti-nutritional factor in cotton seed cake. It causes:
- Pink discoloration of egg white in poultry fed cottonseed meal
- Reduced fertility
- Liver damage
Treatment: Iron supplementation (FeSO₄) — iron binds gossypol and renders it non-toxic. Note: Horses are resistant to gossypol poisoning.
Comparison of Common Protein Concentrates
- GNC: DCP = 45%
- Cotton seed cake: TDN = 80%
- Soybean meal: Contains Kunitz trypsin inhibitor (destroyed by autoclaving)
- Fish meal: Not to exceed 10% in pig diet (fishy flavour in pork)
📚 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.
