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

Table 4.

Effect of corn silage and modified distillers grains with solubles (MDGS) inclusion on cattle performance and carcass characteristics (Exp. 1)

Treatment1 P-value2
Item Control 15:20 45:20 15:40 45:40 SEM F-test Int. Silage MDGS
Performance
    Initial BW, kg 470 468 469 468 469 1 0.17 0.30 0.09 0.72
    Final BW, kg3 622 631 610 618 618 5 0.11 0.08 0.08 0.61
    Live final BW, kg 650 660 650 645 653 6 0.48 0.18 0.84 0.34
    DMI, kg/d 13.2 13.4 13.4 13.0 13.5 0.2 0.48 0.24 0.34 0.47
    ADG, kg3 1.57 1.69 1.46 1.55 1.53 0.05 0.08 0.08 0.05 0.59
    G:F3 0.119ab 0.126a 0.109c 0.118ab 0.114bc 0.003 0.01 0.07 < 0.01 0.69
    NEm4 1.64ab 1.69a 1.56c 1.64ab 1.60bc 0.02 < 0.01 0.09 < 0.01 0.83
    NEg4 1.03ab 1.07a 0.96c 1.03ab 0.99bc 0.02 < 0.01 0.09 < 0.01 0.83
Carcass Characteristics
    HCW, kg 392 398 384 389 389 3 0.12 0.09 0.08 0.57
    Dressing % 60.3a 60.3a 59.1b 60.3a 59.6ab 0.3 0.01 0.37 < 0.01 0.40
    LM area, cm2 89.7b 90.2a 87.2bc 86.7c 87.3bc 0.9 0.04 0.09 0.27 0.11
    12th-rib fat, cm 1.19 1.19 1.18 1.26 1.23 0.04 0.65 0.82 0.65 0.20
    Calculated YG5 3.01 3.03 3.06 3.20 3.14 0.08 0.38 0.58 0.84 0.15
    Marbling Score6 440b 483a 454ab 448b 432b 11 0.03 0.54 0.05 0.02
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.