Table 4.
Effect of dietary concentrate level on enteric methane emission in calves.
|
Item |
Diets1 |
||
|---|---|---|---|
| C20 | C40 | C60 | |
| CH4, g/d | 66.4 ± 3.452b | 61.0 ± 2.990ab | 52.1 ± 2.617a |
| CH4, g/kg DMI | 13.6 ± 1.533 | 11.8 ± 0.924 | 9.47 ± 0.630 |
| CH4, g/kg OMI | 16.7 ± 1.213b | 14.0 ± 0.991ab | 11.4 ± 0.784a |
| CH4, g/kg digestible DMI | 23.4 ± 2.432b | 19.1 ± 1.633ab | 14.0 ± 0.905a |
| CH4, g/kg digestible OMI | 27.4 ± 1.705b | 21.4 ± 1.571a | 16.5 ± 1.062a |
| CH4 energy, MJ/d | 3.72 ± 0.052b | 3.39 ± 0.047ab | 2.92 ± 0.039a |
| CH4 energy loss, % | |||
| GE intake | 4.35 ± 0.481 | 3.74 ± 0.294 | 3.01 ± 0.205 |
| ME intake | 9.14 ± 1.026b | 7.26 ± 0.572ab | 5.50 ± 0.371a |
DMI = dry matter intake; OMI = organic matter intake; GE = gross energy; ME = metabolizable energy.
a, b Within a row, means without a common superscript differ (P < 0.05); number of animals sampled in each group (n = 5).
1
C20, 20:60:20 maize:wheat straw:concentrate; C40, 20:40:40 maize:wheat straw:concentrate; C60, 10:30:60 maize:wheat straw:concentrate.