Table 11 Descriptive statistics of animal, dietary and nitrogen utilization variables in the present study.
Features1 | Unit3 | Abbreviation | Training dataset | Test dataset | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Mean | SD2 | Minimum | Maximum | Mean | SD2 | Minimum | Maximum | |||
Live weight | kg | LW | 564 | 65.3 | 385 | 781 | 549 | 70.1 | 379 | 757 |
Milk yield | kg/d | MY | 21.4 | 6.61 | 6.10 | 49.1 | 23.6 | 7.16 | 5.87 | 48.8 |
Energy-corrected milk yield | kg/d | ECMY | 21.8 | 6.70 | 5.53 | 45.6 | 24.0 | 6.50 | 5.10 | 49.5 |
Forage DMI | kg/d | FDMI | 9.33 | 2.79 | 2.96 | 18.9 | 10.0 | 2.80 | 3.60 | 16.8 |
Concentrate DMI | kg/d | CDMI | 7.08 | 3.51 | 0 | 16.9 | 8.18 | 2.99 | 3.21 | 16.0 |
Total DMI | kg/d | TDMI | 16.4 | 3.02 | 7.54 | 24.3 | 18.2 | 2.92 | 10.8 | 26.6 |
Forage proportion | kg/kg DM | FP | 0.58 | 0.183 | 0.21 | 1.00 | 0.55 | 0.142 | 0.31 | 0.79 |
Diet N concentration | g/kg DM | DNC | 29.3 | 4.15 | 17.0 | 43.3 | 27.8 | 4.02 | 18.0 | 43.0 |
Diet ME concentration | MJ/kg DM | DMEC | 12.1 | 0.92 | 9.89 | 19.1 | 12.1 | 0.82 | 9.68 | 14.1 |
N intake | g/d | NI | 486 | 129.6 | 155 | 874 | 506 | 106.6 | 228 | 798 |
Feces N output | g/d | FN | 142 | 36.1 | 48.4 | 241 | 159 | 32.9 | 73.7 | 284 |
Urine N output | g/d | UN | 209 | 69.1 | 69.6 | 452 | 178 | 61.4 | 44.7 | 364 |
Manure N output | g/d | MN | 351 | 97.7 | 130 | 679 | 337 | 77.1 | 159 | 577 |
