Table 1.
Ingredient composition of BDs used in the experiments, as-fed basis
| Exp. 1 | Exp. 2 | ||
|---|---|---|---|
| Ingredient, % | BD1 | BDSBM2 | BDRSC3 |
| Corn | 69.51 | 60.42 | 60.47 |
| Soybean meal | 25.35 | 35.00 | 15.00 |
| Rapeseed cake | — | — | 20.00 |
| Soybean oil | 2.00 | 2.00 | 2.00 |
| Minerals and vitamin premix4 | 2.00 | 2.00 | 2.00 |
| Limestone | 0.41 | 0.05 | — |
| l-Lysine·H2SO4 | 0.17 | — | — |
| l-Threonine | 0.03 | — | — |
| Vitamin E | 0.03 | 0.03 | 0.03 |
| Titanium dioxide | 0.50 | 0.50 | 0.50 |
1Corn–soybean meal-based basal diet of experiment 1 (Exp. 1); there were three additional diets intended to have a phytase activity of 750, 1,500, or 3,000 FTU/kg.
2Corn–soybean meal-based basal diet of experiment 2 (Exp. 2); there was one additional diet intended to have a phytase activity of 1,500 FTU/kg.
3Corn–soybean meal-rapeseed cake-based basal diet of Exp. 2; there was one additional diet intended to have a phytase activity of 1,500 FTU/kg.
4P-free mineral and vitamin premix (BASU Mineralfutter GmbH, Bad Sulza, Germany) provided per kg of complete diet: Ca, 4.0 g; Na, 1.0 g; Mg, 200 mg; Fe, 80 mg (iron sulfate); Cu, 10 mg (copper sulfate); Mn, 50 mg (manganese oxide and sulfate); Zn, 60 mg (zinc oxide and sulfate); J, 1.34 mg (calcium iodate); Se, 0.26 mg (sodium selenite); Vitamin A, 7,000 IU; Vitamin D, 1,000 IU; Vitamin E, 50 mg; Vitamin K, 1.0 mg; Vitamin B1, 1.0 mg: Vitamin B2, 3.1 mg; Vitamin B6, 2.5 mg; Vitamin B12, 20 µg; Niacin, 12.5 mg; Pantothenic acid, 8.0 mg; Folic acid, 0.4 mg; Biotin, 0.08 mg; Choline chloride, 160 mg.