Table 2.

Composition (as-is basis) of experimental diets

Ingredient, %	SBM	Corn	Wheat	Wheat middlings	Corn–SBM	Wheat–SBM	Wheat middlings–SBM	N-free
Soybean meal	34.00	—	—	—	23.50	21.00	22.00	—
Corn	—	95.30	—	—	72.10	—	—	—
Wheat	—	—	95.65	—	—	74.85	—	—
Wheat middlings	—	—	—	42.00	—	—	41.00	—
Limestone	0.60	0.65	1.10	1.20	0.75	1.05	1.20	0.45
Dicalcium phosphate	0.80	1.10	0.30	0.20	0.70	0.15	—	1.60
Salt	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40
Chromic oxide	0.40	0.40	0.40	0.40	0.40	0.40	0.40	0.40
Soybean oil	2.00	2.00	2.00	2.00	2.00	2.00	2.00	4.00
Vitamin and mineral premix1	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15
Cornstarch	51.65	—	—	43.65	—	—	32.85	68.50
Sugar	10.00	—	—	10.00	—	—	—	20.00
Magnesium oxide	—	—	—	—	—	—	—	0.10
Potassium carbonate	—	—	—	—	—	—	—	0.40
Solka floc	—	—	—	—	—	—	—	4.00
Total	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00

¹The vitamin–micromineral premix provided the following quantities of vitamins and microminerals per kilogram of complete diet: vitamin A as retinyl acetate, 11,136 IU; vitamin D₃ as cholecalciferol, 2,208 IU; vitamin E as dl-alpha tocopheryl acetate, 66 IU; vitamin K as menadione dimethylprimidinol bisulfite, 1.42 mg; thiamin as thiamine mononitrate, 0.24 mg; riboflavin, 6.59 mg; pyridoxine as pyridoxine hydrochloride, 0.24 mg; vitamin B₁₂, 0.03 mg; D-pantothenic acid as D-calcium pantothenate, 23.5 mg; niacin, 44.1 mg; folic acid, 1.59 mg; biotin, 0.44 mg; Cu, 20 mg as copper sulfate and copper chloride; Fe, 126 mg as ferrous sulfate; I, 1.26 mg as ethylenediamine dihydriodide; Mn, 60.2 mg as manganese sulfate; Se, 0.3 mg as sodium selenite and selenium yeast; and Zn, 125.1 mg as zinc sulfate.