Table 2.
Effects of paper mulberry silage on the dry matter intake (DMI) and milk yield of dairy cows.
| Item 1 | Period | Treatment 2 | SEM | p-Values | ||||
|---|---|---|---|---|---|---|---|---|
| CON | PM1 | PM2 | Treatment | Time | Treatment × Time | |||
| DMI, kg/day | І | 23.2 | 23.0 | 22.9 | 0.3 | 0.83 | - | - |
| ІІ | 22.9 | 23.0 | 22.8 | 0.5 | 0.68 | - | - | |
| Milk yield, kg/day | І | 36.1 | 36.0 | 35.9 | 4.4 | 0.87 | 0.97 | 1.00 |
| ІІ | 33.9 a | 32.8 b | 33.8 a | 5.4 | 0.04 | 0.99 | 1.00 | |
| 3.5% FCM, kg/day | І | 38.9 b | 40.7 a | 38.3 b | 6.1 | <0.01 | 0.72 | 1.00 |
| ІІ | 37.3 | 36.3 | 37.0 | 6.2 | 0.17 | 0.41 | 1.00 | |
| ECM, kg/day | І | 39.2 b | 41.1 a | 38.7 b | 5.8 | <0.01 | 0.98 | 1.00 |
| ІІ | 37.7 | 36.6 | 37.4 | 6.4 | 0.10 | 0.17 | 1.00 | |
| Milk composition, % | ||||||||
| Protein | І | 3.6 b | 3.7 a | 3.6 b | 0.3 | <0.01 | <0.01 | 1.00 |
| ІІ | 3.7 | 3.6 | 3.6 | 0.4 | 0.54 | <0.01 | 0.99 | |
| Fat | І | 4.0 b | 4.3 a | 3.9 b | 0.1 | <0.01 | 0.92 | 0.99 |
| ІІ | 4.1 | 4.2 | 4.1 | 0.5 | 0.23 | 0.11 | 0.38 | |
| Lactose | І | 5.1 | 5.1 | 5.1 | 0.2 | 0.11 | <0.01 | 0.34 |
| ІІ | 4.9 b | 5.0 b | 5.1 a | 0.6 | <0.01 | 0.02 | 0.98 | |
| MUN | І | 10.5 b | 11.0 a | 11.2 a | 1.3 | <0.01 | <0.01 | 0.90 |
| ІІ | 15.0 b | 17.3 a | 17.1 a | 1.3 | <0.01 | 1.00 | <0.01 | |
| SCC | І | 16.6 b | 26.3 a | 14.0 b | 27.5 | <0.01 | 1.00 | 0.90 |
| ІІ | 22.2 a | 15.0 b | 18.2 b | 22.4 | <0.01 | 0.60 | 1.00 | |
| Efficiency, kg/kg | ||||||||
| Milk yield/DMI | І | 1.6 | 1.6 | 1.6 | 0.2 | 0.58 | 0.99 | 1.00 |
| ІІ | 1.5 a | 1.4 b | 1.5 a | 0.2 | 0.01 | 0.99 | 1.00 | |
| 3.5% FCM/DMI | І | 1.7 b | 1.8 a | 1.7 b | 0.1 | <0.01 | 0.92 | 1.00 |
| ІІ | 1.6 | 1.6 | 1.6 | 0.1 | 0.23 | 0.11 | 0.38 | |
a,b Least squares means within a row with different superscripts differ significantly (p ≤ 0.05). 1 DMI: dry matter intake; FCM: fat-corrected milk; ECM: energy-corrected milk; MUN: milk urea nitrogen; and SCC: somatic cell count. 3.5% FCM (kg/day) = 0.432 × milk yield + 16.23 × fat yield; ECM (kg/day) = 12.82 × fat yield + 7.13 × protein yield + 0.323 × milk yield. 2 The CON group had non-PM silage diets during period I and period II; the PM1 group had 4.5 and 13.5% PM silage diets during period I and period II, respectively; and the PM2 group had 9 and 18% PM silage diets during period I and period II, respectively.