| Variables | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | ||
| B | Std. Error | Beta | ||||
| 氮 | (Constant) | 185.721 | 20.270 |
| 9.162 | 0.000 |
| 基质氮 | 5.712E−03 | 0.002 | 0.222 | 2.863 | 0.005 | |
| 肥料氮 | −51.678 | 6.449 | −0.622 | −8.013 | 0.000 | |
| 磷 | (Constant) | 192.845 | 18.782 |
| 10.268 | 0.000 |
| 基质磷 | 6.074 | 2.005 | 0.234 | 3.030 | 0.003 | |
| 肥料磷 | −46.345 | 5.740 | −0.625 | −8.074 | 0.000 | |
| 钾 | (Constant) | 176.460 | 21.954 |
| 8.038 | 0.000 |
| 基质钾 | 1.651 | 0.545 | 0.234 | 3.030 | 0.003 | |
| 肥料钾 | −40.883 | 5.063 | −0.625 | −8.074 | 0.000 | |