Table 4.

Composition of experimental diets containing torula yeast or fish meal (as-is basis), experiment 3

Item	No phytase		1,000 units of phytase
Source of P:	Torula yeast	Fish meal	Torula yeast	Fish meal
Ingredient, %
Torula yeast	39.35	—	39.35	—
Fish meal	—	29.50	—	29.50
Sucrose	8.00	8.00	8.00	8.00
Cornstarch	50.30	61.95	50.28	61.93
Ground limestone	1.80	—	1.80	—
Sodium chloride	0.40	0.40	0.40	0.40
Vitamin–mineral premix1	0.15	0.15	0.15	0.15
Phytase concentrate2	—	—	0.02	0.02
Analyzed values
DM, %	93.41	91.26	93.17	90.96
Ash, %	6.97	6.33	7.16	6.40
Ca, %	0.53	1.62	0.53	1.75
P, %	0.68	0.95	0.77	0.93
Phytate3, %	0.10	0.24	0.10	0.24
Phytate-bound P4, %	0.03	0.07	0.03	0.07
Nonphytate P4, %	0.65	0.88	0.74	0.86
Phytase activity, FTU5/kg	<70	<70	770	620

¹The vitamin–micromineral premix provided the following quantities of vitamins and micro minerals per kilogram of complete diet: vitamin A as retinyl acetate, 11,150 IU; vitamin D₃ as cholecalciferol, 2,210 IU; vitamin E as _DL-alpha tocopheryl acetate, 66 IU; vitamin K as menadione dimethylprimidinol bisulfite, 1.42 mg; thiamin as thiamine mononitrate, 1.10 mg; riboflavin,6.59 mg; pyridoxine as pyridoxine hydrochloride, 1.00 mg; vitamin B₁₂, 0.03 mg; _d-pantothenic acid as _d-calcium pantothenate, 23.6 mg; niacin, 44.1 mg; folic acid, 1.59 mg; biotin, 0.44 mg; Cu, 20 mg as copper sulfate; Fe, 125 mg as ironsulfate; I, 1.26 mg as ethylenediamine dihydriodide; Mn, 60.2 mg as manganoussulfate; Se, 0.30 mg as sodium selenite and selenium yeast; and Zn, 125.1 mg as zinc sulfate.

²The phytase concentrate contained 5,000 units of phytase/g (Quantum Blue; AB Vista Feed Ingredients, Marlborough, UK).

³Phytate values in the diets were calculated from analyzed phytate in the ingredients.

⁴Phytate-bound P was calculated by multiplying the phytate by 0.282 (Tran and Sauvant, 2004). Nonphytate P was calculated as the difference between total P and phytate-bound P.

⁵FTU, phytase units.