| Hybrids | Nitrogen Level (kg∙ha−1) | Observed | Predicted | aP-O | PD (%) |
| Hysun-33 | 0 kg∙ha−1 | 2923 | 486 | −2437 | −83.4 |
| 45 kg∙ha−1 | 3078 | 1658 | −1420 | −46.1 | |
| 90 kg∙ha−1 | 3500 | 3315 | −185 | −5.2 | |
| 135 kg∙ha−1 | 3884 | 3944 | 60 | 1.5 | |
| 180 kg∙ha−1 | 3935 | 3915 | −20 | −0.5 | |
| S-78 | 0 kg∙ha−1 | 3212 | 496 | −2716 | −84.6 |
| 45 kg∙ha−1 | 3406 | 2028 | −1378 | −40.4 | |
| 90 kg∙ha−1 | 3805 | 3314 | −491 | −12.9 | |
| 135 kg∙ha−1 | 4055 | 3671 | −384 | −9.5 | |
| 180 kg∙ha−1 | 4095 | 2932 | −1163 | −28.4 | |
| Mean |
|
|
| −1013 | −30.9 |
| RMSE | 191.81 | ||||