Topics:
Animal Refresher, Poultry Science
Calcium Level in Broiler and Layer Feed
Percent calcium level in broiler and layer feed should be respectively:
- 2% & 3%
- 1% & 4%
- 1% & 3–3.5% — Correct Answer
- 2% & 4%
Explanation:
Correct Answer: 1% & 3–3.5%
As per BIS 2007 standards:
- Broiler feed: Calcium minimum = 1% (for all phases: prestarter, starter, finisher)
- Layer feed: Calcium minimum = 3.0% (Phase I) to 3.5% (Phase II)
Why Layers Need Much More Calcium
- The eggshell is composed of 96% inorganic matter, of which 94% is calcium carbonate (CaCO₃).
- Each egg shell contains approximately 2 g of calcium.
- A laying hen producing 300 eggs/year needs a continuous supply of calcium for shell formation.
- Calcium deficiency in layers causes soft-shelled eggs and osteoporosis (cage layer fatigue).
Phosphorus Levels (BIS 2007)
- Broiler: 0.7% (all phases)
- Layer Phase I: 0.65%, Layer Phase II: 0.65%
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This multiple choice question is from Animal Refresher, Poultry Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
