Table 1.
Composition of the basal diet of breeder hens.
| Ingredient, % | Value |
|---|---|
| Corn | 67.8 |
| Wheat bran | 5.96 |
| Soybean protein concentrate | 15.8 |
| DL-Methionine | 0.28 |
| Calcium carbonate (analytically pure) | 6.84 |
| Dicalcium phosphate (food-grade) | 2.07 |
| Salt (NaCl) | 0.25 |
| Premix1 | 1.00 |
| Nutritional level2 | |
| ME, Kcal/kg | 2,748 |
| CP, % | 16.3 |
| Lysine, % | 0.80 |
| Methionine + cysteine, % | 0.80 |
| Calcium, % | 3.29 |
| Nonphytate phosphorus, % | 0.45 |
| Cu, mg/kg3 | 3.71 |
| Cu, mg/kg4 | 3.50 |
Provided per kg of diet: vitamin A, 12,000 IU (transretinyl acetate); cholecalciferol, 2,500 IU; vitamin E, 30 IU (DL-α-tocopheryl acetate); vitamin K, 1.5 mg, thiamine, 2 mg; riboflavin, 10 mg; niacin, 30 mg; pantothenic acid, 10 mg; vitamin B6, 4 mg; folic acid, 1.1 mg; cobalamin, 0.01 mg; biotin, 0.15 mg; 50% choline chloride, 900 mg; FeSO4•H2O, 240 mg; ZnSO4•H2O, 209 mg; MnSO4•H2O, 283 mg; NaSeO3, 0.56 mg; Ca(IO3)2•H2O, 1.46 mg; ethoxyquin, 150 mg; calcium propanoate, 1.00 g; NaHCO3, 1.50 g; maize cob meal (carrier), 4.75 g.
Values were calculated based on the data presented in the Chinese feed database (Chinese feed database. 2018).
Calculated Cu content based on Cu analyses in corn, wheat bran, and soybean protein concentrate.
Copper was analyzed by atomic absorption spectrophotometry.