Table 3.
Fatty acid profile and monensin concentration in fresh and ensiled TMR (exp. 1)
| Treatment1 | P-value contrast | |||||||
|---|---|---|---|---|---|---|---|---|
| Item | U | SMnf | SM | SG | SEM | U vs. SMnf | SMnf vs. SM | SM vs. SG |
| Fresh TMR | ||||||||
| Monensin, mg/kg DM | 33.6 | 35.4 | 32.9 | 33.3 | 1.34 | 0.37 | 0.23 | 0.86 |
| Fatty acids, % total fatty acids | ||||||||
| C16:0 | 18.9 | 18.4 | 18.9 | 18.0 | 0.36 | 0.41 | 0.43 | 0.13 |
| C18:0 | 5.21 | 5.40 | 4.71 | 5.01 | 0.242 | 0.59 | 0.08 | 0.40 |
| C18:1 trans-9 | 2.29 | 2.30 | 1.76 | 1.74 | 0.283 | 0.98 | 0.21 | 0.97 |
| C18:1 cis-9 | 25.7 | 25.8 | 25.3 | 23.7 | 0.17 | 0.66 | 0.09 | <0.01 |
| C18:2 cis-9,12 | 45.7 | 45.8 | 46.6 | 46.8 | 0.67 | 0.93 | 0.41 | 0.83 |
| C18:3 cis-9,12,15 | 1.07 | 1.10 | 1.42 | 3.40 | 0.050 | 0.71 | <0.01 | <0.01 |
| Other fatty acids | 1.16 | 1.19 | 1.32 | 1.36 | 0.046 | 0.65 | 0.08 | 0.55 |
| Ensiled TMR | ||||||||
| Monensin, mg/kg DM | 31.5 | 33.1 | 30.8 | 31.1 | 1.25 | 0.73 | 0.23 | 0.29 |
| Fatty acids, % total fatty acids | ||||||||
| C16:0 | 18.4 | 18.5 | 18.6 | 18.1 | 0.19 | 0.40 | 0.65 | 0.15 |
| C18:0 | 4.33 | 4.42 | 4.35 | 5.02 | 0.231 | 0.97 | 0.83 | 0.11 |
| C18:1 trans-9 | 1.84 | 1.48 | 1.42 | 1.69 | 0.235 | 0.24 | 0.86 | 0.54 |
| C18:1 cis-9 | 26.7 | 25.3 | 24.4 | 23.8 | 0.24 | <0.01 | 0.02 | <0.01 |
| C18:2 cis-9,12 | 46.3 | 48.1 | 48.5 | 46.9 | 0.53 | 0.02 | 0.63 | 0.15 |
| C18:3 cis-9,12,15 | 1.24 | 1.29 | 1.59 | 3.61 | 0.127 | 0.09 | 0.13 | <0.01 |
| Other fatty acids | 1.17 | 0.91 | 1.19 | 0.86 | 0.120 | 0.89 | 0.14 | 0.76 |
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.