Table 3.

Diet composition (as-fed basis), Exp. 2¹

	Standardized ileal digestible Lys, %
Ingredient	0.75	0.90	1.05	1.20
Corn	73.40	68.36	63.28	58.51
Soybean meal, 46.5% CP	19.28	24.23	29.18	33.96
Corn oil	3.00	3.00	3.00	3.00
Limestone	1.41	1.39	1.36	1.34
Monocalcium P, 21%	1.33	1.30	1.27	1.24
Salt	0.50	0.50	0.50	0.50
L-Lys-HCL	0.15	0.19	0.23	0.28
L-Thr	0.04	0.07	0.11	0.15
L-Trp	0.01	0.01	0.02	0.02
DL-Met	---	0.003	0.05	0.09
L-Val	0.06	0.12	0.18	0.24
Sal Curb2	0.33	0.33	0.33	0.33
Sow vitamin/mineral premix3	0.20	0.20	0.20	0.20
Choline chloride	0.13	0.13	0.13	0.13
AxtraPhy 25004	0.02	0.02	0.02	0.02
Dye5	0.16	0.16	0.16	---
Total	100	100	100	100
Calculated analysis
Standardized ileal digestible (SID) AA, %
Lys	0.75	0.90	1.05	1.20
IIe:Lys	71	68	66	64
Met: Lys	30	30	30	31
Met & Cys: Lys	61	56	56	56
Thr:Lys	67	67	67	67
Trp:Lys	20	20	20	20
Val:Lys	90	90	90	90
Total Lys, %	0.87	1.04	1.20	1.37
ME, kcal/kg	3,479	3,479	3,479	3,479
CP, %	15.5	17.5	19.6	21.6
Ca, %	0.85	0.85	0.85	0.85
P, %	0.62	0.63	0.65	0.66
Available P, %	0.45	0.45	0.45	0.45

¹Diets were fed from d 114 of gestation to weaning.

²Kemin Industries (Des Moines, IA).

³Provided per kg of premix: 18 mg Cu; 0.8 mg I; 100 mg Fe; 40 mg Mn; 0.15 mg Se; 125 mg Zn; 11,000 IU vitamin A, 1,980 IU vitamin D; 99 IU vitamin E; 4 mg vitamin K; 0.04 mg vitamin B12; 44.2 mg niacin; 27.5 mg pantothenic acid; 8.6 mg riboflavin; 3.1 mg folic acid; 0.44 mg biotin; 5.1 mg vitamin B6; 2.2 mg thiamin; 0.44 mg chromium.

⁴Dupont (St. Louis, MO).

⁵Different colored dyes were added to distinguish among diets at the farm.