Table 1.

Composition of experimental diets in starter (0–4 WOA) and grower period (5–8 WOA).

Age (weeks)	0–4			5–8
Lysine concentration (%)	0.85	1.14	1.425	0.75	1.00	1.08
Ingredients	%
Corn, yellow # 2 (8% CP)	50.61	49.22	50.33	61.67	62.02	53.14
Soybean meal (48% CP)	14.10	30.92	31.20	13.50	27.12	34.90
Corn gluten meal (60% CP)	17.60	6.00	6.00	17.80	0.00	0.00
Wheat middlings	10.36	4.40	2.67	0.00	0.00	0.00
Alfalfa meal (17% CP)	1.00	1.00	1.00	1.00	1.00	1.00
Poultry blended fat	2.30	4.62	4.62	2.10	5.50	6.80
Dicalcium phosphate (18% P, 22% Ca)	1.74	1.74	1.74	1.75	1.75	1.74
Limestone flour (38.8% Ca)	1.45	1.45	1.45	1.25	1.40	1.45
Salt	0.30	0.30	0.30	0.30	0.30	0.30
Vitamin–mineral premix1	0.25	0.25	0.25	0.25	0.25	0.25
DL-methionine (98%)2	0.03	0.01	0.16	0.01	0.16	0.13
L-Arg,%	0.20	0.10	0.28	0.23	0.29	0.20
L-Thr,%	0.00	0.00	0.00	0.12	0.15	0.00
L-Ile,%	0.00	0.00	0.00	0.00	0.00	0.00
L-Val,%	0.00	0.00	0.00	0.02	0.02	0.00
L-Lys HCl,%	0.06	0.00	0.36	0.00	0.04	0.09
Calculated levels
ME (kcal/kg diet)	3,100	3,100	3,100	3,200	3,200	3,200
Crude protein	23	23	23	22	22	22
L-Lys	0.85	1.14	1.42	0.75	1.00	1.08
Analyzed levels
ME, kcal/kg	3,100	3,100	3,100	3,200	3,200	3,200
CP, %	23	23	23	22	22	22

Abbreviation: WOA, weeks of age.

¹Provided per kg of diet: retinyl acetate, 3,500 IU; cholecalciferol, 1,000 ICU; DL-α-tocopheryl acetate, 4.5 IU; menadione sodium bisulfate complex, 2.8 mg; vitamin B₁₂, 5.0 mg; riboflavin, 2.5 mg; pantothenic acid, 4.0 mg; niacin, 15.0 mg; choline, 172 mg; folic acid, 230 mg; ethoxyquin, 56.7 mg; manganese, 65 mg; iodine, 1 mg; iron, 54.8 mg; copper, 6 mg; zinc, 55 mg; and selenium, 0.3 mg.

²Degussa Corporation, Kennesaw, GA.