| Variables | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | |
| B | Std. Error | Beta | |||
氮 | (Constant) | 77.123 | 6.561 |
| 11.755 | 0.000 |
基质氮 | 0.386 | 0.228 | 0.150 | 1.695 | 0.093 | |
肥料氮 | −11.117 | 1.941 | −0.505 | −5.729 | 0.000 | |
磷 | (Constant) | 79.662 | 5.693 |
| 13.993 | 0.000 |
基质磷 | 1.030 | 0.608 | 0.150 | 1.695 | 0.093 | |
肥料磷 | −9.967 | 1.740 | −0.505 | −5.729 | 0.000 | |
钾 | (Constant) | 76.883 | 6.654 |
| 11.554 | 0.000 |
基质钾 | 0.280 | 0.165 | 0.150 | 1.695 | 0.093 | |
肥料钾 | −8.793 | 1.535 | −0.505 | −5.729 | 0.000 |