Table 3.
Influence of protein and energy level on dietary energy and observed to expected DMI of feedlot hair lambs
| Item | Energy level (Mcal ME/kg) | Main effects | p-value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
|||||||||||
| 3.05 | 2.83 | Energy level (Mcal ME/kg) | Protein level (%) | |||||||||
|
|
|
|
|
|
||||||||
| 17.5% CP |
14.5% CP |
17.5% CP |
14.5% CP |
SEM | 3.05 | 2.83 | 17.5 | 14.5 | E | P | E×P | |
| NE diet (Mcal/kg) | ||||||||||||
| Maintenance | 2.05 | 2.03 | 1.91 | 1.88 | 0.04 | 2.04a | 1.89b | 1.98 | 1.95 | <0.01 | 0.51 | 0.96 |
| Gain | 1.39 | 1.37 | 1.26 | 1.24 | 0.03 | 1.38a | 1.25b | 1.33 | 1.30 | <0.01 | 0.51 | 0.96 |
| Obs to exp NE | ||||||||||||
| Maintenance | 0.99 | 0.98 | 1.01 | 0.99 | 0.02 | 0.98 | 1.00 | 1.00 | 0.99 | 0.33 | 0.51 | 0.93 |
| Gain | 0.98 | 0.97 | 1.00 | 0.99 | 0.02 | 0.97 | 1.00 | 0.99 | 0.98 | 0.34 | 0.57 | 0.99 |
| Obs to exp DMI | 1.01 | 1.04 | 0.99 | 1.00 | 0.02 | 1.02 | 1.00 | 1.00 | 1.02 | 0.24 | 0.46 | 0.87 |
SEM = Standard error mean; E = Energy; P = Protein; E×P = Energy and protein levels interaction.
Initial and final BW were reduced 4% to account for fill.
a,b,c
Different letters in the same variable indicate statistical differences (p≤0.05).