Table-1.
Effect of YCW supplementation on production performances of dairy cows in different LPs.
| Variables | Treatments (Mean±SE) | p-value | |||||
|---|---|---|---|---|---|---|---|
| Control | YCW | ||||||
| Early lactation | Mid lactation | Early lactation | Mid lactation | TM† | LP†† | TM*LP | |
| DMI (kg/d) | 21.59 | 21.64 | - | - | - | ||
| Milk yield | |||||||
| kg/d | 25.52±1.96 | 24.48±1.73 | 28.97±1.54 | 22.83±1.82 | 0.627 | 0.028 | 0.117 |
| 4% FCM | 25.18±1.83 | 24.66±1.62 | 28.95±1.44 | 22.92±1.70 | 0.585 | 0.026 | 0.063 |
| ECM | 27.01±1.96 | 26.80±1.73 | 30.98±1.54 | 24.86±1.82 | 0.603 | 0.040 | 0.065 |
| Milk composition (%) | |||||||
| Fat | 3.93±0.17 | 4.11±0.15 | 4.02±0.14 | 3.99±0.16 | 0.856 | 0.623 | 0.451 |
| Protein | 3.31±0.09 | 3.58±0.08 | 3.30±0.07 | 3.48±0.09 | 0.611 | 0.016 | 0.693 |
| Lactose | 5.20±0.09 | 5.19±0.08 | 5.27±0.07 | 5.04±0.08 | 0.715 | 0.263 | 0.318 |
| SNF | 8.74±0.14 | 9.00±0.12 | 8.83±0.11 | 8.77±0.13 | 0.650 | 0.308 | 0.347 |
| Milk component yield (kg/d) | |||||||
| Fat | 1.00±0.08 | 0.99±0.07 | 1.16±0.06 | 0.92±0.07 | 0.576 | 0.037 | 0.054 |
| Protein | 0.84±0.06 | 0.87±0.05 | 0.95±0.05 | 0.80±0.06 | 0.674 | 0.160 | 0.083 |
| Lactose | 1.33±0.11 | 1.27±0.09 | 1.48±0.08 | 1.16±0.10 | 0.842 | 0.035 | 0.136 |
| SNF | 2.22±0.17 | 2.20±0.15 | 2.55±0.14 | 2.02±0.16 | 0.633 | 0.047 | 0.087 |
| Somatic cell count (SCC) | |||||||
| Count (104/ml) | 20.56±10.03 | 26.54±8.84 | 10.87±7.86 | 11.38±9.30 | 0.130 | 0.548 | 0.684 |
| Index (log10) | 1.09±0.20 | 1.11±0.18 | 0.87±0.16 | 1.14±0.19 | 0.570 | 0.395 | 0.522 |
| MUN (mg/dL) | 11.98±0.41 | 12.66±0.37 | 12.28±0.32 | 12.77±0.38 | 0.556 | 0.431 | 0.557 |
DMI=Dry matter intake, FCM=Fat corrected milk, ECM=Energy corrected milk, SNF=Solid non-fat, SCC=Somatic cell count, MUN=Milk urea nitrogen, YCW=Yeast cell wall, SE=Standard error,
†
p value for treatment (TM) groups (control vs. YCW),
††
p value for lactation period (LP) (early lactation vs. mid lactation)