| Variables | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | ||
| B | Std. Error | Beta | ||||
| 氮 | (Constant) | 22.854 | 2.402 |
| 9.514 | 0.000 |
| 基质氮 | −8.030E−02 | 0.083 | −0.089 | −0.964 | 0.338 | |
| 肥料氮 | −3.524 | 0.711 | −0.455 | −4.959 | 0.000 | |
| 磷 | (Constant) | 22.325 | 2.084 |
| 10.710 | 0.000 |
| 基质磷 | −0.214 | 0.222 | −0.089 | −0.964 | 0.338 | |
| 肥料磷 | −3.159 | 0.637 | −0.455 | −4.959 | 0.000 | |
| 钾 | (Constant) | 22.904 | 2.436 |
| 9.401 | 0.000 |
| 基质钾 | −5.827E−02 | 0.060 | −0.089 | −0.964 | 0.338 | |
| 肥料钾 | −2.787 | 0.562 | −0.455 | −4.959 | 0.000 | |