Table 1.

Composition and nutrient levels of the basal diets (air-dry basis).

Items	1–21 d	22–42 d
Ingredients (%)
Corn	56.00	60.24
Soybean meal	32.69	24.67
Wheat middling	5.00	9.00
Soybean oil	2.10	1.80
Phytases	0.02	0.02
Dicalcium phosphate	1.00	1.60
Limestone	1.50	1.20
DL-Methionine	0.15	0.12
L-Lysine	0.20	0.10
Vitamin premix 1	0.02	0.02
Trace mineral premix 2	0.20	0.20
NaCl	0.35	0.30
Choline chloride (50%)	0.24	0.20
Ethoxyquin (33%)	0.03	0.03
Bentonite	0.50	0.50
Total	100	100
Nutrient levels 3 (%)
AME (MJ/kg)	12.31	12.53
Crude protein (%)	19.52	16.83
Lysine (%)	1.12	0.87
Methionine (%)	0.46	0.39
Calcium (%)	0.88	0.89
Available phosphorus (%)	0.29	0.39
Total phosphorus (%)	0.54	0.62
Methionine + Cysteine (%)	0.79	0.69

¹ The vitamin premix provided the following per kilogram of diet: vitamin A, 12,500 IU; vitamin D₃, 3500 IU; vitamin E, 20 IU; vitamin K₃, 2.65 mg; thiamin, 2.00 mg; riboflavin, 6.00 mg; pyridoxin, 3.00 mg; VB₁₂, 0.025 mg; biotin, 0.0325 mg; folic acid, 12.00 mg; pantothenic acid, 50 mg; nicotinic acid, 50.00 mg. ² The mineral premix provided the following per kg of diet: Cu, 6 mg; Fe, 80 mg; Zn, 40 mg; Mn, 100 mg; Se, 0.15mg; I, 0.35 mg. ³ Calculated values.