Table 2.

Diet composition (as-fed basis)

Item	Phase1
	1	2	3
Ingredient, %
Corn	71.48	78.42	82.85
Soybean meal	25.71	19.20	14.93
Monocalcium P (21% P)	0.55	0.33	0.30
Limestone	1.13	1.10	1.08
Salt	0.35	0.35	0.35
L-Lys HCl	0.31	0.25	0.22
DL-Met	0.06	0.02	—
L-Thr	0.09	0.05	0.05
Trace mineral premix2	0.15	0.13	0.10
Vitamin premix3	0.15	0.13	0.10
Phytase4	0.02	0.02	0.02
Total	100	100	100
Calculated analysis
Standardized ileal digestible (SID) amino acids, %
Lys	1.05	0.85	0.72
Ile:Lys	62	64	66
Met:Lys	30	29	30
Met & Cys:Lys	55	56	59
Thr:Lys	61	61	64
Trp:Lys	18.0	18.0	18.0
Val:Lys	69	73	76
Total Lys, %	1.18	0.96	0.82
Net energy, kcal/kg	2,462	2,507	2,534
SID Lys:net energy, g/Mcal	4.26	3.39	2.84
Crude protein, %	18.5	15.9	14.2
Ca, %	0.62	0.55	0.52
P, %	0.49	0.41	0.39
STTD P, %5	0.35	0.30	0.28
Chemical analysi s, %6
Dry matter	88.32	87.25	87.41
Crude protein	18.5	15.4	14.8

¹Phases 1, 2 and 3 are fed from approximately 56 to 83, 83 to 98, and 98 to 124 kg, respectively.

²Provided per kilogram of premix: 11 g Cu from copper sulfate, 0.2 g I from Ca iodate, 73 g Fe from ferrous sulfate, 22 g Mn from manganese sulfate, 0.2 g Se from sodium selenite, and 73 g Zn from zinc sulfate.

³Provided per kilogram of premix: 3,527,360 IU Vitamin A, 881,840 IU vitamin D3, 17,637 IU vitamin E, 15 mg vitamin B12, 3,307 mg riboflavin, 33,069 mg niacin, 11,023 mg pantothenic acid, and 1,764 mg menidione.

⁴HiPhos (DSM Inc, Parsippany, NJ) provided phytase units 3,174,624 (FTU)/kg of product and released 0.10% digestible P.

⁵STTD = standardized total tract digestible.

⁶Six samples of each diet were collected, blended and subsampled, and analyzed (Ward Laboratories, Inc. Kearney, NE).