Table 2.

Phase 1 and phase 2 diet composition and bulk density, experiment 1 (as-fed basis)¹

Item	Phase 1					Phase 2
	Soybean hulls, %					Soybean hulls, %
	0	5	10	15	20	0	5	10	15	20
Corn	54.69	50.09	45.49	40.89	36.28	63.74	59.06	54.37	49.71	45.03
Soybean meal, 46.5% crude protein	29.40	29.06	28.71	28.36	28.02	32.79	32.53	32.26	31.99	31.72
Soybean hulls	—	5.00	10.00	15.00	20.00	—	5.00	10.00	15.00	20.00
Select menhaden fish meal	3.00	3.00	3.00	3.00	3.00	—	—	—	—	—
Spray-dried whey	10.00	10.00	10.00	10.00	10.00	—	—	—	—	—
Monocalcium P, 21% P	0.65	0.65	0.65	0.65	0.65	1.05	1.05	1.05	1.05	1.05
Limestone	0.88	0.81	0.75	0.69	0.63	0.95	0.89	0.83	0.77	0.71
Salt	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35
Vitamin premix2	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25
Trace mineral premix3	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15
l-Lysine HCl	0.25	0.24	0.24	0.23	0.23	0.33	0.32	0.32	0.31	0.30
dl-Methionine	0.12	0.13	0.14	0.15	0.16	0.13	0.14	0.15	0.15	0.16
l-Threonine	0.13	0.14	0.14	0.15	0.15	0.13	0.13	0.14	0.14	0.15
Phytase4	0.13	0.13	0.13	0.13	0.13	0.13	0.13	0.13	0.13	0.13
Total	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Calculated analysis
SID amino acids, %
Lysine	1.32	1.32	1.32	1.32	1.32	1.28	1.28	1.28	1.28	1.28
Isoleucine:lysine	62	62	62	62	62	61	61	61	61	61
Leucine:lysine	127	125	124	122	121	129	127	126	124	123
Methionine:lysine	34	34	35	35	35	33	34	34	34	34
Methionine and cysteine:lysine	58	58	58	58	58	58	58	58	58	57
Threonine:lysine	65	65	65	65	65	63	63	63	63	63
Tryptophan:lysine	18	18	18	17	17	17	18	18	18	18
Valine:lysine	68	68	67	67	66	68	68	67	67	66
Total lysine, %	1.46	1.47	1.48	1.49	1.50	1.42	1.43	1.44	1.45	1.46
NE, Mcal/kg	2.40	2.33	2.25	2.17	2.09	2.37	2.29	2.21	2.13	2.05
SID Lys:NE, g/Mcal	5.50	5.67	5.87	6.08	6.32	5.40	5.59	5.79	6.01	6.24
Crude protein, %	21.8	21.8	21.8	21.8	21.9	21.1	21.2	21.2	21.3	21.3
Crude fiber, %	2.4	3.9	5.5	7.0	8.6	2.7	4.2	5.8	7.3	8.9
ADF, %	3.1	5.0	6.9	8.7	10.6	3.6	5.4	7.3	9.2	11.1
NDF, %	7.9	10.2	12.6	14.9	17.3	9.0	11.4	13.7	16.1	18.4
Calcium, %	0.80	0.80	0.80	0.80	0.80	0.69	0.69	0.69	0.69	0.69
Phosphorus, %	0.66	0.65	0.64	0.63	0.62	0.63	0.62	0.61	0.60	0.60
Available P, %	0.48	0.48	0.48	0.48	0.48	0.42	0.42	0.42	0.42	0.42
Bulk density, g/L	810	769	714	676	659	802	772	718	720	666

¹Diets were fed in meal form from d 0 to 13 for phase 1 and d 13 to 34 for phase 2.

²Provided per kg of premix: 4,409,200 IU vitamin A; 551,150 IU vitamin D₃; 17,637 IU vitamin E; 1,764 mg vitamin K; 3,307 mg riboflavin; 11,023 mg pantothenic acid; 19,841 mg niacin; and 15.4 mg vitamin B₁₂.

³Provided per kg of premix: 26.5 g Mn from manganese oxide; 110 g Fe from iron sulfate; 110 g Zn from zinc sulfate; 11 g Cu from copper sulfate; 198 mg I from calcium iodate; and 198 mg Se from sodium selenite.

⁴Phyzyme 600 (Danisco Animal Nutrition, St. Louis, MO) provided 509 phytase units (FTU)/kg, with a release of 0.10% available P.