| LAB | Lactic acid bacteria |
| FA | Fatty acid |
| UFA | Unsaturated fatty acid |
| SFA | Saturated fatty acid |
| PUFA | Polyunsaturated fatty acid |
| MUFA | Monounsaturated fatty acid |
| VFA | Volatile atty acid |
| CH4 | Methane |
| DMI | Dry matter intake |
| DM | Dry matter |
| OM | Organic matter |
| CP | Crude protein |
| RF | Rumen fluid |
| H2 | Hydrogen |