Topics:
Animal Nutrition, Animal Refresher
In-Vivo Digestibility Estimation Methods
Which of the following is an In-vivo method of digestibility estimation?
- Nylon/Dacron bag technique
- VIVAR technique
- Both a & b — Correct Answer
- In-vitro gas production technique
Explanation:
Correct Answer: Both a & b
Both the Nylon/Dacron bag technique and the VIVAR technique (In-Vivo Artificial Rumen Technology) are in-vivo methods of digestibility estimation.
Methods of Digestibility Estimation
| Category | Method |
|---|---|
| Conventional (Total collection) | Direct method |
| Indirect/Indicator method (internal indicators) | |
| Indirect/Indicator method (external indicators) | |
| In-Vivo methods | Nylon bag / Dacron bag technique |
| VIVAR technology (In-Vivo Artificial Rumen) | |
| In-Vitro methods | In-Vitro gas production technique, Tilley & Terry method |
Key Notes
- In-vitro gas production technique → NOT in-vivo; it is performed in laboratory conditions
- Nylon bag technique: feed sample in nylon bag placed in rumen via cannula; degradation measured over time
- VIVAR: simulates rumen conditions in an artificial apparatus inside the animal
Why Other Options Are Wrong
- Nylon/Dacron bag alone → correct, but incomplete; VIVAR is also in-vivo
- VIVAR alone → correct, but incomplete; Nylon bag is also in-vivo
- In-vitro gas production technique → this is an IN-VITRO method; not in-vivo
📚 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.
