Table 1.

Composition of the control diets, as fed

	Positive control	Negative control
Ingredients (%)
Corn	60.1	62.7
Soybean meal	33.1	32.5
Soybean oil	2.72	1.50
Sodium bicarbonate	0.20	0.20
Salt	0.14	0.14
Monocalcium phosphate	1.33	0.56
Limestone	1.36	1.27
Lysine-HCl	0.03	0.05
DL-methionine	0.23	0.23
L-threonine	0.04	0.01
Titanium dioxide	0.30	0.30
Vitamin-mineral premix1	0.50	0.50
Calculated provisions
Crude protein (%)	22.5	22.5
ME (kcal/kg)	3,055	3,017
Digestible lys (%)	1.00	1.00
Digestible met+cys (%)	0.77	0.77
Digestible Thr (%)	0.67	0.63
Ca (%)	0.95	0.79
Total P (%)	0.64	0.48
Non-phytate P (%)	0.40	0.24
Ca: available P	2.38	2.63

¹Supplied per kilogram of diet: vitamin A, 8,255 IU; vitamin D₃, 3,000 IU; vitamin E, 30 IU; vitamin K, 2 mg; Thiamine (vitamin B₁), 4 mg; riboflavin (vitamin B₂), 6 mg; niacin, 41.2 mg; folic acid, 1 mg; biotin, 0.25 mg; pyridoxine, 4 mg; choline, 1,301; Pantothenic acid, 11 mg; vitamin B₁₂, 0.013 mg; Mn, 70 mg; Zn, 80 mg; Fe, 80 mg; Cu, 10 mg; and Na, 1.7 g.