| Variables | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | ||
| B | Std. Error | Beta | ||||
| 氮 | (Constant) | 36.043 | 3.310 |
| 10.889 | 0.000 |
| 基质氮 | −0.357 | 0.115 | −0.275 | −3.109 | 0.002 | |
| 肥料氮 | −4.853 | 0.979 | −0.439 | −4.957 | 0.000 | |
| 磷 | (Constant) | 33.694 | 2.872 |
| 11.731 | 0.000 |
| 基质磷 | −0.953 | 0.307 | −0.275 | −3.109 | 0.002 | |
| 肥料磷 | −4.351 | 0.878 | −0.439 | −4.957 | 0.000 | |
| 钾 | (Constant) | 36.265 | 3.357 |
| 10.802 | 0.000 |
| 基质钾 | −0.259 | 0.083 | −0.275 | −3.109 | 0.002 | |
| 肥料钾 | −3.838 | 0.774 | −0.439 | −4.957 | 0.000 | |