Table 1 Ingredients, chemical composition, and particle size distribution of experimental diets (% of TMR DM).

Item	Coarsely ground			Steam flaked
Item	CAN	CASY	SOY	CAN	CASY	SOY
Ingredients
Wheat straw	5.00	5.00	5.0	5.0	5.0	5.0
Corn grain	44.0	50.5	55.0	44.0	50.5	55.0
Canola meal	43.5	18.5	–	43.5	18.5	–
Soybean meal	–	18.50	32.50	–	18.5	32.5
Calcium carbonate	1.50	1.50	1.50	1.50	1.50	1.50
Dicalcium phosphate	0.50	0.50	0.50	0.50	0.50	0.50
Sodium bicarbonate	1.50	1.50	1.50	1.50	1.50	1.50
Magnesium oxide	0.50	0.50	0.50	0.50	0.50	0.50
Salt	0.50	0.50	0.50	0.50	0.50	0.50
Bentonite	0.50	0.50	0.50	0.50	0.50	0.50
Vitamin premix^a	1.25	1.25	1.25	1.25	1.25	1.25
Mineral premix^b	1.25	1.25	1.25	1.25	1.25	1.25
Chemical composition, (g/kg of DM)
DM	93.50	93.00	93.20	93.45	93.65	93.10
OM	86.51	86.42	86.49	86.55	86.44	86.49
CP	18.51	18.46	18.42	18.54	18.52	18.58
EE	4.30	4.27	3.95	4.28	4.22	3.80
NDF	27.74	20.40	17.71	26.05	24.16	19.42
ADF	11.95	11.55	6.44	12.45	11.36	7.75

DM dry matter, CP crude protein, EE ether extract, NDF neutral detergent fiber, ADF acid detergent.
Cornprocessing (coarsely ground vs steam flaked) and protein source [100% canola meal (CAN), 50% canola meal + 50% soybean meal (CASY), 100% soybean meal (SOY)].
^aVitamin premix: Vit A (IU) = 1,150,000, Vit D3 (IU) = 80,000, Vit E (IU) = 6700, Vit B1(ppm) = 880, Vit B2 (ppm) = 850, Vit B3 (ppm) = 1740, Vit B5 (ppm) = 1346, Vit B6 (ppm) = 873, Vit B9 (ppm) = 77, Vit B12 (ppm) = 9.3, Vit C (ppm) = 16,500, Biotin (ppm) = 13.5, Choline (ppm) = 7500.
^bMineral premix: Mg (ppm) = 44,000, Ca (ppm) = 64,000, P (ppm) = 30,000, Na (ppm) = 60,000, Cl (ppm) = 75,000, Fe (ppm) = 10,500, Mn (ppm) = 4000, Zn (ppm) = 4600, Cu (ppm) = 1000, I (ppm) = 25, Co (ppm) = 10, Se (ppm) = 37.

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