Table 4.
Two-year finishing (160 d period) performance of steers backgrounded by either grazing corn residue and being supplemented with dried distillers plus solubles at 2.68 kg DM/steer 6 d/wk (RESIDUE), grazing a late summer planted oat-brassica forage mix (CCROP) or being fed a corn silage-based diet in drylot (DRYLOT)
| Treatments | P-value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Year 1 | Year 2 | |||||||||
| Item | RESIDUE | CCROP | DRYLOT | RESIDUE | CCROP | DRYLOT | SEM1 | Year | Treatment | Year × treatment2 |
| Initial finishing BW, kg | 365b | 381a | 365b | 367b | 381a | 357c | 2.5 | 0.43 | <0.01 | 0.18 |
| Final live BW,3 kg | 608b | 625a | 614b | 616a | 622a | 570b | 4.0 | <0.01 | <0.01 | <0.01 |
| Final BW,4 kg | 627b | 648a | 631b | 640a | 645a | 593b | 3.4 | <0.01 | <0.01 | <0.01 |
| Daily DMI, kg | 10.2a | 10.3a | 9.6b | 10.9a | 10.7a | 9.0b | 0.13 | 0.12 | <0.01 | <0.01 |
| ADG,4 kg | 1.64 | 1.67 | 1.67 | 1.71a | 1.66a | 1.47b | 0.022 | 0.01 | <0.01 | <0.01 |
| G:F,4 kg/kg | 0.161b | 0.162b | 0.174a | 0.157ab | 0.155b | 0.162a | 0.0021 | <0.01 | <0.01 | 0.28 |
a–c
Means within item and year with different superscripts differ (P ≤ 0.05).
1
Standard error of the least squares mean (n = 4 replications/year).
2
Year × background treatment interaction.
3
BW were taken prior to feeding on the day they were hauled to the packing plant, with a calculated 4% shrink.
4
Carcass-adjusted final BW, ADG, and G:F using a common dressing percent of 62%.