| DM (g kg−1) | TN (kg m−3) | pH | Reference |
| 30.5 ± 2.2 | 2.0 ± 0.1 | 7.3 ± 0.1 | The present study |
| 62.7 ± 20.7 | 3.4 ± 1.4 | 7.3 ± 0.2 | Cui, Askari [19] |
| 105.0 ± 4.0 | 4.4 ± 0.3 | 7.5 ± 0.1 | Alaoui, Lipiec [20] |
| 59.1 ~ 80.5 | 2.1 ~ 4.4 | -- | Munkholm, Heck [21] |