| Variables | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | ||
| B | Std. Error | Beta | ||||
| 氮 | (Constant) | 7.429 | 0.578 |
| 12.859 | 0.000 |
| 基质氮 | −2.844E−02 | 0.020 | −0.116 | −1.420 | 0.159 | |
| 肥料氮 | −1.261 | 0.171 | −0.603 | −7.380 | 0.000 | |
| 磷 | (Constant) | 7.242 | 0.501 |
| 14.446 | 0.000 |
| 基质磷 | −7.596E−02 | 0.054 | −0.116 | −1.420 | 0.159 | |
| 肥料磷 | −1.131 | 0.153 | −0.603 | −7.380 | 0.000 | |
| 钾 | (Constant) | 7.447 | 0.586 |
| 12.709 | 0.000 |
| 基质钾 | −2.064E−02 | 0.015 | −0.116 | −1.420 | 0.159 | |
| 肥料钾 | −0.997 | 0.135 | −0.603 | −7.380 | 0.000 | |