Table 1.
Effect of Perilla frutescens leaf (PFL) supplementation on feed intake and lactation performance in dairy cows.
| Item | CON | PFL | SEM | p-Value | ||
|---|---|---|---|---|---|---|
| Treatment | Week | Treatment × Week | ||||
| Dry matter intake, kg/d | 24.3 | 24.7 | 0.17 | 0.23 | <0.01 | 0.63 |
| Milk yield, kg/d | ||||||
| Raw | 36.8 | 39.2 | 0.77 | 0.04 | <0.01 | 0.12 |
| ECM a | 45.4 | 47.3 | 1.34 | 0.35 | 0.04 | 0.57 |
| Protein | 1.28 | 1.36 | 0.026 | 0.04 | 0.10 | 0.73 |
| Fat | 1.76 | 1.78 | 0.078 | 0.91 | <0.01 | 0.41 |
| Lactose | 1.84 | 2.05 | 0.046 | 0.01 | 0.10 | 0.77 |
| Total solids | 4.98 | 5.27 | 0.127 | 0.12 | 0.07 | 0.66 |
| Milk content, g/100g | ||||||
| Protein | 3.47 | 3.39 | 0.037 | 0.19 | <0.01 | 0.58 |
| Fat | 4.80 | 4.40 | 0.187 | 0.15 | <0.01 | 0.09 |
| Lactose | 5.05 | 5.10 | 0.025 | 0.18 | 0.60 | 0.08 |
| TS | 13.5 | 13.1 | 0.21 | 0.19 | <0.01 | 0.16 |
| Milk urea nitrogen, mg/dL | 16.3 | 16.8 | 0.34 | 0.34 | <0.01 | 0.93 |
| Fat: Protein | 1.38 | 1.30 | 0.051 | 0.30 | <0.01 | 0.16 |
| Somatic cell count, ×103 | 386.6 | 269.9 | 109.74 | 0.46 | 0.89 | 0.99 |
| Feed efficiency b | 1.51 | 1.63 | 0.011 | <0.01 | <0.01 | 0.48 |
a ECM = Energy-corrected milk. ECM (kg) = 0.3246 × milk yield (kg) + 13.86 × fat yield (kg) + 7.04 × protein yield (kg); b Feed efficiency = milk yield/dry matter intake.