Topics:
Animal Nutrition, Animal Refresher
Flieg-Index — Application in Fodder Quality Evaluation
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Question (English)
The 'Flieg-index' is a commonly used method for evaluation of quality of which fodder?
- Hay quality
- Haylage quality
- Soilage quality
- Silage quality ✓ Correct
Explanation:
Correct Answer: Silage quality
The Flieg-index is a widely used scoring method to evaluate silage quality. It is calculated from the proportions of organic acids (lactic acid, acetic acid, butyric acid) and ammoniacal nitrogen in silage, giving a numerical index.
Silage Quality Classification (from notes)
- Very good: pH 3.5–4.2, NH₃-N < 10%, Butyric acid = nil
- Good: pH 4.2–4.5, NH₃-N = 10–15%, Butyric acid = trace
- Fair: pH > 4.8, NH₃-N > 20%, Butyric acid = some
Silage Making Key Facts
- Chief acid produced: Lactic acid
- Good silage colour: Yellowish or brownish-green
- Brown colour of silage: due to Phaeophytin (chlorophyll converted during ensiling)
- Brown colour of HAY: due to Maillard reaction
📚 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.
