| Variables | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | ||
| B | Std. Error | Beta | ||||
| 氮 | (Constant) | 6.815 | 0.692 |
| 9.850 | 0.000 |
| 基质氮 | −2.615E−02 | 0.024 | −0.106 | −1.090 | 0.279 | |
| 肥料氮 | −0.707 | 0.205 | −0.335 | −3.456 | 0.001 | |
| 磷 | (Constant) | 6.643 | 0.600 |
| 11.064 | 0.000 |
| 基质磷 | −6.984E−02 | 0.064 | −0.106 | −1.090 | 0.279 | |
| 肥料磷 | −0.634 | 0.183 | −0.335 | −3.456 | 0.001 | |
| 钾 | (Constant) | 6.831 | 0.702 |
| 9.734 | 0.000 |
| 基质钾 | −1.898E−02 | 0.017 | −0.106 | −1.090 | 0.279 | |
| 肥料钾 | −0.559 | 0.162 | −0.335 | −3.456 | 0.001 | |