Table 2.

Ingredient and nutrient composition of basal experimental diets (as-fed basis)

Items	Phase 1 (days 0–14)	Phase 2 (days 15–28)	Phase 3 (days 29–42)
Ingredients, %
Corn, yellow dent	54.77	57.82	58.54
Canola meal	7.00	5.00	8.00
Soybean meal, 47.5% CP	18.00	20.00	26.00
Defatted rice bran	3.00	3.00	3.00
Plasma spray dried	4.00	1.50	0.00
Whey powder	5.00	5.00	0.00
Fish meal, menhaden	3.00	2.00	0.00
Choice white grease	2.65	2.80	2.60
Limestone	1.00	0.82	0.64
Salt	0.30	0.30	0.30
Vitamin premixa	0.11	0.11	0.11
Mineral premixb	0.40	0.40	0.40
Phytase premixc	0.20	0.20	0.20
Titanium dioxide	0.00	0.40	0.00
L-lysine HCl	0.38	0.43	0.18
MHAd	0.10	0.10	0.03
L-threonine	0.09	0.12	0.00
Total	100.00	100.00	100.00
Calculated nutrient composition
ME, kcal/kg	3,401	3,404	3,353
CP, %	22.31	20.29	20.90
SID Lys, %	1.40	1.28	1.07
SID Thr, %	0.82	0.76	0.64
SID Met + Cys, %	0.67	0.59	0.60
SID Trp, %	0.24	0.21	0.21
STTD P, %	0.30	0.25	0.18
Phytate P, %	0.30	0.29	0.34
Analyzed nutrient composition
Ca, %	0.66	0.67	0.50
Total P, %	0.58	0.55	0.50

CP, crude protein; ME, metabolizable energy; SID, standardized ileal digestible.

^aSupplied the following nutrients per kilogram of diets: vitamin A, 11,000 IU; vitamin D, 1,760 IU; vitamin E, 83.6 IU; vitamin K, 5.5 mg; thiamine, 3.52 mg; riboflavin, 13.2 mg; niacin, 70.4 mg; pantothenic acid, 39.6 mg; pyridoxine, 7.04 mg; folic acid, 1,045 µg; biotin, 275 µg; vitamin B12, 55 µg.

^bFour different mineral premixes are made for each phase according to the treatment description in Table 1. ZnO is included in the respective treatments directly at the expense of corn.

^cPhytase premix is made to provide 500 FTU/kg for the four respective treatments at the inclusion level of 0.2%.

^dMHA is dry calcium salt of D, L-2-hydroxy-4-(methylthio)butanoic acid (84% Met activity, MHA, Novus International, Inc., St. Charles, MO).