Table 1.
Fatty acids (FAs), vitamin E and mineral composition of the silage offered to the cattle during winter housing from three pasture-based systems over 3 years.
| Item | PP | GWC | MG | SED | P (F2,4) |
|---|---|---|---|---|---|
| Fatty acids (g/kg DM) | |||||
| C12:0 | 0.100a | 0.082b | 0.080b | 0.0039 | 0.014 |
| C14:0 | 0.203 | 0.165 | 0.183 | 0.0110 | 0.062 |
| C16:0 | 3.61a | 3.21b | 3.65a | 0.113 | 0.033 |
| C16:1n-7 | 0.222 | 0.175 | 0.224 | 0.0211 | 0.131 |
| C18:0 | 0.367 | 0.344 | 0.380 | 0.0155 | 0.170 |
| C18:1n-9 | 0.553b | 0.600ab | 0.648a | 0.0231 | 0.037 |
| C18:1n-7 | 0.145 | 0.135 | 0.152 | 0.0104 | 0.361 |
| C18:2n-6 | 3.21 | 2.91 | 3.31 | 0.242 | 0.335 |
| C18:3n-3 | 10.1 | 8.59 | 9.87 | 0.816 | 0.257 |
| C20:0 | 0.148 | 0.147 | 0.157 | 0.0053 | 0.234 |
| Sum FAs | 22.6 | 19.5 | 22.4 | 1.32 | 0.133 |
| Vitamin (mg/kg DM) | |||||
| E | 71.3 | 76.2 | 86.7 | 4.63 | 0.067 |
| Macro minerals (g/kg DM) | |||||
| Ca | 7.115 | 7.694 | 7.001 | 0.7827 | 0.666 |
| K | 25.0b | 24.3c | 26.7a | 0.47 | 0.016 |
| Mg | 1.87a | 1.62b | 1.57b | 0.078 | 0.037 |
| Na | 2.95a | 1.79b | 1.82b | 0.235 | 0.013 |
| P | 3.20 | 3.05 | 3.12 | 0.116 | 0.498 |
| S | 2.24 | 2.04 | 2.25 | 0.103 | 0.183 |
| Micro minerals (mg/kg DM) | |||||
| As | 0.251 | 0.239 | 0.253 | 0.0333 | 0.912 |
| Co | 0.824 | 0.654 | 0.750 | 0.1816 | 0.671 |
| Cr | 1.87 | 1.89 | 2.77 | 0.545 | 0.277 |
| Cu | 24.7 | 20.6 | 22.2 | 3.15 | 0.491 |
| Fe | 487 | 472 | 475 | 71.0 | 0.974 |
| Mo | 1.36 | 1.11 | 0.96 | 0.182 | 0.204 |
| Mn | 182a | 156b | 140b | 9.6 | 0.030 |
| Ni | 1.35 | 1.44 | 1.79 | 0.128 | 0.056 |
| Se | 0.247 | 0.231 | 0.243 | 0.0302 | 0.857 |
| Zn | 70.6 | 51.8 | 59.4 | 11.91 | 0.377 |
| Non-nutritional elements (mg/kg DM) | |||||
| Al | 544 | 550 | 543 | 91.4 | 0.996 |
| Cd | 0.036 | 0.039 | 0.042 | 0.0057 | 0.629 |
| Pb | 0.345 | 0.356 | 0.316 | 0.0757 | 0.867 |
| Ti | 11.0 | 10.4 | 10.9 | 0.6764 | 0.661 |
Abbreviations: PP = permanent pasture; GWC = grass and white clover; MG = short-term monoculture grass ley.
abcValues within a row with different superscripts differ significantly at P < 0.05.