Table 2.
Mean and standard deviation (in parentheses) of days in milk (DIM, d), age of cow (Age, m), milk yield (MY, kg/d), fat yield (FY, kg/d), protein yield (PY, kg/d), energy corrected milk (ECM, kg/d), dry matter intake (DMI, kg/d), and body weight (BW, kg) for the cows in the DRTC and ODRC herds measured for methane emission.
| Herd | DIM | Age | MY | FY | PY | ECM | DMI | BW |
|---|---|---|---|---|---|---|---|---|
| DRTC 1 | 132 (73) |
24.4 (2.0) |
32.65 (6.57) |
1.214 (0.297) |
1.037 (0.204) |
30.96 (6.10) |
20.44 (3.60) |
259 (30) |
| ODRC 2 | 140 (85) |
24.5 (1.6) |
30.85 (5.23) |
1.241 (0.222) |
1.007 (0.158) |
30.62 (4.65) |
19.04 (5.02) |
295 (28) |
1 DRTC: Dairy Research and Technology Centre; 2 ODRC: Ontario Dairy Research Centre.