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. 2017 Sep 1;1(3):382–396. doi: 10.2527/tas2017.0046

Table 5.

Effect of corn silage and modified distillers grains with solubles (MDGS) inclusion on cattle performance and carcass characteristics (Exp. 2)

Treatment1 P-value2
Item Control SEM 45:20 15:40 45:40 SEM F-test Int. Silage MDGS
Performance
    Initial BW, kg 348 348 347 346 348 1 0.51 0.18 0.85 0.40
    Final BW, kg3 633 629 623 637 626 4 0.18 0.41 0.01 0.12
    Live final BW, kg 645 646 643 652 640 4 0.35 0.20 0.04 0.75
    DMI, kg/d 12.3 11.9 12.2 12.0 12.1 0.1 0.13 0.41 0.07 0.86
    ADG, kg3 1.96 1.93 1.90 2.00 1.92 0.03 0.11 0.18 0.01 0.06
    G:F3 0.159bc 0.163ab 0.156c 0.167a 0.158c 0.002 < 0.01 0.61 < 0.01 0.07
    NEm4 1.85c 1.89ab 1.83c 1.92a 1.86bc 0.01 < 0.01 0.81 < 0.01 0.06
    NEg4 1.21c 1.25ab 1.19c 1.27a 1.22bc 0.01 < 0.01 0.81 < 0.01 0.06
Carcass Characteristics
    HCW, kg 399 396 393 401 394 3 0.18 0.41 0.01 0.12
    Dressing % 61.9 61.3 61.1 61.6 61.6 0.2 0.22 0.54 0.51 0.08
    LM area, cm2 84.1 84.3 84.3 83.7 81.8 1.4 0.62 0.39 0.38 0.15
    12th-rib fat, cm 1.66 1.61 1.60 1.77 1.61 0.07 0.43 0.27 0.25 0.26
    Calculated YG5 3.81 3.72 3.69 3.96 3.83 0.12 0.54 0.66 0.43 0.09
    Marbling Score6 451 437 455 459 432 17 0.74 0.12 0.74 0.99
a–c

Within a row, values lacking common superscripts differ when F-test was significant (P < 0.05).

1

15:40= 15% Corn Silage, 40% MDGS; 30:40= 30% Corn Silage, 40% MDGS; 45:40= 45% Corn Silage, 40% MDGS; 55:40= 55% Corn Silage, 40% MDGS; 30:65= 30% Corn Silage, 65% MDGS; 45:0= 45% Corn Silage, 0% MDGS.

2

F-test = P-value for the overall F-test of all diets. Int. = P-value for the interaction of corn silage × MDGS. Silage = P-value for the main effect of corn silage inclusion. MDGS = P-value for the main effect of MDGS inclusion.

3

Calculated from hot carcass weight, adjusted to a common 63% dressing percentage.

4

NEm and NEg calculated using methodology of NRC (1996) using a tool developed by Galyean (2009).

5

Calculated YG (yield grade) = [2.5 + (6.35 × fat thickness, cm) + (0.2 × 2.5% KPH) + (0.0017 × HCW, kg) – (2.06 × LM area, cm2)]; (USDA, 2016).

6

Marbling Score: 400 = Small00, 500 = Modest00.