Table 2.

Ingredient composition of basal diets containing 0.23%, 0.29%, or 0.35% phytate-bound P, as-fed basis¹,²

	Phytate-bound P, %
Item	0.23	0.29	0.35
Ground corn	61.08	58.05	57.28
Soybean meal	23.00	19.00	11.90
Canola meal	1.00	12.46	23.50
Cornstarch	9.00	5.00	2.00
Soybean oil	3.00	3.00	3.00
Ground limestone	1.17	1.05	0.92
Monocalcium phosphate	0.17	0.05	—
l-Lys	0.47	0.38	0.41
dl-Met	0.06	0.02	—
l-Thr	0.10	0.04	0.03
l-Trp	—	—	0.01
Titanium dioxide	0.40	0.40	0.40
Salt	0.40	0.40	0.40
Vitamin–mineral premix3	0.15	0.15	0.15

¹Twelve additional diets were prepared by adding a phytase to each basal diet at the expense of corn starch. The phytase premix was prepared by mixing phytase concentrates with corn. The concentrates were formulated to provide 500, 1,000, 2,000, or 4,000 FTU/kg of a novel consensus bacterial 6-phytase variant (PhyG; Danisco Animal Nutrition, The Netherlands).

²Three additional diets were prepared by adding a premix containing a commercial PhyB concentrate and corn to each of the three basal diets. This premix provided 1,000 FTU/kg (PhyB; Danisco Animal Nutrition, The Netherlands) to each diet.

³Provided 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 chloride; Fe, 126 mg as ferrous sulfate; I, 1.26 mg as ethylenediamine dihydriodide; Mn, 60.2 mg as manganese hydroxychloride; Se, 0.3 mg as sodium selenite and selenium yeast; and Zn, 125.1 mg as zinc hydroxychloride.