Table 4.
Chemical composition of offered TMR silages (mean ± SD; exp. 2)
| Treatment1 | ||||
|---|---|---|---|---|
| Item | U | SMnf | SM | SG |
| DM, % as fed | 60.6 ± 1.26 | 63.5 ± 1.75 | 60.7 ± 0.97 | 61.6 ± 1.36 |
| CP | 13.2 ± 0.42 | 13.5 ± 0.49 | 13.8 ± 0.25 | 13.5 ± 0.19 |
| N fractionation2, % N | ||||
| A1 | 26.7 ± 2.70 | 6.02 ± 0.57 | 8.37 ± 1.86 | 9.02 ± 1.41 |
| A2 | 44.6 ± 3.02 | 41.3 ± 0.65 | 52.6 ± 1.78 | 52.4 ± 1.71 |
| B1 | 22.2 ± 0.96 | 40.7 ± 0.96 | 31.7 ± 0.59 | 31.3 ± 0.65 |
| B2 | 2.25 ± 0.27 | 6.35 ± 0.58 | 1.59 ± 0.58 | 1.81 ± 0.50 |
| C | 4.28 ± 0.35 | 5.60 ± 0.64 | 5.76 ± 0.73 | 5.49 ± 0.46 |
| NDF | 29.1 ± 2.77 | 29.7 ± 2.57 | 29.7 ± 2.31 | 30.8 ± 4.26 |
| ADF | 14.1 ± 2.00 | 14.4 ± 1.59 | 13.8 ± 2.04 | 15.6 ± 2.87 |
| EE | 3.72 ± 0.29 | 3.67 ± 0.24 | 3.54 ± 0.12 | 5.04 ± 0.15 |
| Non-fiber carbohydrates | 50.6 ± 2.46 | 48.2 ± 2.32 | 49.1 ± 2.21 | 46.0 ± 4.29 |
| Soluble carbohydrates | 1.19 ± 0.21 | 1.72 ± 0.08 | 1.34 ± 0.21 | 1.80 ± 0.10 |
| Ash | 4.54 ± 0.22 | 4.99 ± 0.30 | 4.81 ± 0.23 | 4.72 ± 0.13 |
1U, ensiled with urea; SMnf, ensiled without a protein supplement at ensiling but soybean meal supplemented at feeding; SM, ensiled with soybean meal; SG, ensiled with rolled soybean grain.
2Nitrogen fractionation according to CNCPS (Higgs et al., 2015).