Table 1 Nutritional requirements of meat-type (White Pekin ducks) and egg-type ducks (Longyan ducks) in commercial production
From: Nutritional requirements of meat-type and egg-type ducks: what do we know?
Nutrient | 1–21 d | 22–42 d | Laying period |
|---|---|---|---|
Metabolizable energy, kcal/kg | 2,900 | 3,000 | 2,500 |
Protein, % | 20 | 18 | 17 |
Methionine, % | 0.48–0.50 | 0.47–0.50 | 0.40 |
Lysine, % | 1.1 | 1.0 | 0.80 |
Threonine, % | 0.70–0.80 | 0.70–0.80 | 0.60 |
Tryptophan, % | 0.23 | 0.23 | 0.21 |
Calcium, % | 0.83 | 0.89 | 3.60 |
Available phosphorus, % | 0.40 | 0.40 | 0.35 |
Manganese, mg/kg | 80–100 | 80–100 | 90 |
Zinc, mg/kg | 60 | 60 | 90 |
Iron, mg/kg | 60 | 60 | 50 |
Copper, mg/kg | 10 | 10 | 10 |
Iodine, mg/kg | 0.2 | 0.2 | 0.50 |
Selenium, mg/kg | 0.3 | 0.3 | 0.40 |
Vitamin A, IU | 10,000 | 8,000 | 12,000 |
Vitamin D3, IU | 3,000 | 3,000 | 2,000 |
Vitamin E, mg/kg | 20.0 | 20.0 | 38.0 |
Vitamin K, mg/kg | 2.0 | 2.0 | 1.0 |
Thiamine, Vitamin B1, mg/kg | 2.0 | 2.0 | 3.0 |
Riboflavin, Vitamin B2, mg/kg | 10.0 | 8.0 | 9.6 |
Pyridoxine, Vitamin B6, mg/kg | 4.0 | 4.0 | 6.0 |
Cyanocobalamin, Vitamin B12, mg/kg | 0.02 | 0.02 | 0.03 |
Choline, mg/kg | 1,000 | 750 | 500 |
Pantothenic acid, mg/kg | 20.0 | 10.0 | 28.5 |
Folic acid, mg/kg | 1.0 | 1.0 | 0.6 |
Biotin, mg/kg | 0.2 | 0.2 | 0.15 |
Niacin, mg/kg | 50.0 | 50.0 | 25.0 |