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. 2017 Nov;95(11):5124–5136. doi: 10.2527/jas2017.1464

Table 1.

Dietary ingredients and calculated nutritional composition of receiving and step-up diets fed to steers

Adaptation diet
Item Receiving(65% concentrate) Step-up 2 (75% concentrate) Step-up 3(85% concentrate)
Days on feed 17 4 4
Period included in the study No Yes Yes
Ingredient, % DM
    Steam-flaked corn (330 g/L) 38.72 47.32 57.05
    Wet corn gluten feed (Sweet Bran1) 20.00 20.00 20.00
    Alfalfa hay 17.50 12.50 7.50
    Cottonseed hulls 17.50 12.50 7.50
    Yellow grease 3.00 3.00 3.00
    Supplement2 2.00 2.00 2.00
    Urea 0.38 0.48 0.60
    Limestone 0.90 1.20 1.35
    Premix3 0 1.00 1.00
Calculated composition,4 DM basis
    DM, % as-is basis 82.1 80.1 79.7
    CP 13.5 13.5 13.5
    Ca 0.61 0.64 0.61
    P 0.36 0.36 0.36
    K 0.98 0.89 0.79
    S 0.21 0.21 0.21
    NEm, Mcal/kg 1.81 1.93 2.06
1

Cargill Corn Milling, Blair, NE.

2

Supplement contained (DM basis) 67.7538% carrier (cottonseed meal), 0.5% antioxidant (Endox; Kemin Industries, Inc., Des Moines, IA), 3.76% urea, 10% potassium chloride, 15% sodium chloride, 0.0022% cobalt carbonate, 0.1965% copper sulfate, 0.0833% iron sulfate, 0.0031% ethylenediamine dihydroiodide, 0.167% manganous oxide, 0.125%, 0.9859% zinc sulfate, 0.0099% vitamin A (1,000,000 IU/g), and 0.157% vitamin E (500 IU/g) and provided (dietary) 30 mg/kg of monensin (0.75% Rumensin-90 in supplement; Elanco Animal Health, Indianapolis, IN) and 9 mg/kg of tylosin (0.5063% Tylan-40 in supplement; Elanco Animal Health).

3

Premix contained the following: cottonseed meal for the control diet, 0.33% tannic acid (ByPro; Silvateam USA, Ontario, CA) for the 30 g DM of ByPro/steer daily diet, and 0.66% tannic acid (ByPro) for the 60 g DM of ByPro/steer daily diet. Cottonseed meal was used as the carrier for the ByPro premixes.

4

Calculated composition using tabular values (NRC, 1996).