| Variables | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | ||
| B | Std. Error | Beta | ||||
| 氮 | (Constant) | 3.037 | 0.251 |
| 12.093 | 0.000 |
| 基质氮 | −1.303E−02 | 0.009 | −0.126 | −1.496 | 0.138 | |
| 肥料氮 | −0.507 | 0.074 | −0.573 | −6.829 | 0.000 | |
| 磷 | (Constant) | 2.951 | 0.218 |
| 13.542 | 0.000 |
| 基质磷 | −3.480E−02 | 0.023 | −0.126 | −1.496 | 0.138 | |
| 肥料磷 | −0.455 | 0.067 | −0.573 | −6.829 | 0.000 | |
| 钾 | (Constant) | 3.045 | 0.255 |
| 11.955 | 0.000 |
| 基质钾 | −9.457E−03 | 0.006 | −0.126 | −1.496 | 0.138 | |
| 肥料钾 | −0.401 | 0.059 | −0.573 | −6.829 | 0.000 | |