Table 1. Compositions of the basal and low crude protein diets (as-fed basis).

Ingredient (%)	Basal diet	Low crude protein diet
Corn	60.81	66.12
Extruded corn	5.00	5.00
Lactose	3.00	3.00
Dehulled soybean meal (51% CP)	13.00	8.07
Soy protein concentrate (65% CP)	10.00	10.00
Plasma powder	3.00	2.50
Soy oil	2.00	2.00
Monocalcium phosphate	1.15	1.15
Limestone	0.99	0.99
L-Lysine-HCl (78%)	0.04	0.07
DL-Methionine (50%)	0.11	0.30
Choline chloride (25%)	0.10	0.10
Vitamin premix1)	0.20	0.20
Trace mineral premix2)	0.20	0.20
Salt	0.40	0.30
Total	100	100
Calculated nutrient levels
ME (kcal/kg)	3,386	3,385
CP (%)	18.78	16.92
Lysine	1.23	1.23
Methionine	0.36	0.36
Ca (%)	0.70	0.70
P (%)	0.60	0.60
Analyzed nutrient levels
CP (%)	20.53	18.51
Lysine	1.23	1.23
Methionine	0.36	0.36
Tryptophan	0.19	0.15
Arginine	0.70	0.65
Isoleucine	0.76	0.74
Leucine	1.47	1.42
Phenylalanine	0.86	0.81
Threonine	0.78	0.74
Valine	0.88	0.87
Histidine	0.53	0.50

Provided per kg of complete diet: vitamin A, 11,025 IU; vitamin D3, 1,103 IU; vitamin E, 44 IU; vitamin K, 4.4 mg; riboflavin, 8.3 mg; niacin, 50 mg; thiamine, 4 mg; d-pantothenic, 29 mg; choline, 166 mg; vitamin B₁₂, 33 μg.
Provided per kg of complete diet without Zinc: Cu (as CuSO₄ · 5H₂O), 12 mg; Mn (as MnO₂), 8 mg; I (as KI), 0.28 mg; and Se (as Na₂SeO₃ · 5H₂O), 0.15 mg.
CP, crude protein; ME, metabolizable energy.