Question

The pH of very good quality silage shall be in the range of

• A. 6.5 - 7.2
• B. 3.5 - 4.2
• C. 4.8 - 6.0
• D. 4.2 - 4.5

Hint:

An ideal silage fermentation results in a high concentration of lactic acid, which drops the pH below 4.2, successfully inhibiting volatile butyric acid-producing organisms and molds.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The success of the ensiling process depends on anaerobic lactic acid bacteria converting soluble carbohydrates into lactic acid, lowering the pH to preserve the forage.

Step 3: Detailed Explanation:
Silage quality is classified by its final pH and acidic profile:
1. Very good silage: pH range of 3.5 to 4.2. This denotes a rapid, dominant lactic acid fermentation, ensuring stable preservation and minimizing nutrient loss.
2. Good silage: pH range of 4.2 to 4.5.
3. Fair silage: pH range of 4.5 to 4.8.
4. Poor silage: pH above 4.8, which indicates clostridial activity, butyric acid production, and structural protein degradation.

Step 4: Final Answer
The pH range characteristic of very good quality silage is 3.5 - 4.2.