Table 2 Descriptive statistics of the test-day records of milk yield (kg) for some selected days in milk with 3X and 4X milking frequency
3X Milking | 4X Milking | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lact 1 | Lact 2 | Lact 1 | Lact 2 | |||||||||
DIM | N | Mean | SD | N | Mean | SD | N | Mean | SD | N | Mean | SD |
5–35 | 6392 | 29.7 | 4.9 | 7691 | 38 | 6.3 | 1142 | 32.5 | 5 | 1313 | 41.8 | 6.1 |
36–65 | 7022 | 33.4 | 4.9 | 8218 | 40.7 | 6.4 | 1298 | 37.3 | 4.8 | 1374 | 46.1 | 6.2 |
66–95 | 7097 | 33.9 | 5.1 | 8246 | 40.2 | 6.6 | 1292 | 38.6 | 4.9 | 1375 | 45.8 | 6.2 |
96–125 | 7430 | 33.4 | 5 | 8778 | 38.6 | 6.6 | 1336 | 38 | 4.8 | 1467 | 43.8 | 6.2 |
126–155 | 6816 | 32.8 | 5.3 | 7815 | 36.4 | 6.7 | 1330 | 37.2 | 4.8 | 1448 | 41.3 | 6.1 |
156–185 | 6293 | 32.4 | 5.4 | 7057 | 34.4 | 6.7 | 1375 | 36.4 | 4.8 | 1394 | 38.8 | 5.9 |
186–225 | 5234 | 31.8 | 5.6 | 5456 | 32.5 | 6.7 | 1336 | 35.4 | 4.7 | 1260 | 36.6 | 6.3 |
226–245 | 4287 | 31 | 5.6 | 4138 | 30.9 | 6.8 | 1324 | 34.4 | 4.6 | 1217 | 34.2 | 6.3 |
246–275 | 3105 | 30 | 5.7 | 2702 | 29.1 | 6.7 | 1318 | 39 | 4.5 | 1045 | 31.8 | 6.2 |
276–305 | 1938 | 29.2 | 5.8 | 1453 | 26.7 | 6.1 | 1045 | 31.9 | 4.8 | 747 | 29.8 | 6 |