Topics:
Animal Nutrition, Animal Refresher
Energy Value Equivalents of TDN
Which of the following pair is correctly matched?
- 1 Kg TDN = 4.4 Mcal of DE
- 1 Kg TDN = 0.86 Starch equivalent
- 1 Kg TDN = 3.6 Mcal of ME
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
Total Digestible Nutrients (TDN) is a historical energy expression system. All three given equivalencies are correct and should be memorised.
TDN Energy Equivalences
| TDN Equivalent | Value |
|---|---|
| 1 kg TDN = ______ Mcal DE | 4.4 Mcal of Digestible Energy |
| 1 kg TDN = ______ Mcal ME | 3.6 Mcal of Metabolic Energy (because DE × 0.82 = ME) |
| 1 kg TDN = ______ Starch Equivalent | 0.86 Starch Equivalent |
TDN Formula
- TDN% = DCP% + DCF% + DNFE% + (DEE × 2.25)
- Fat is multiplied by 2.25 because fat has 2.25 times the energy value of carbohydrates
- 0.32 kg TDN is required by a cow for 1 litre of milk production
Why Other Options Are Wrong
- Each individual pair is correct — 4.4 Mcal DE, 0.86 SE, and 3.6 Mcal ME are all established equivalences, making "All the above" the complete and correct 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.
