Table 4 Linear regression model of plant growth parameters and chlorophyll, chlorophyll fluorescence parameters
Growth parameters | Linear regression model | AIC | R2 | P |
|---|---|---|---|---|
Plant height | y = 8.028–7.074 × 1–34.508 × 2 + 0.359 × 3 | −30.584 | 0.882 | 0.000 |
Rooting rate | y = − 46.617 + 11.847 × 3 + 38.395 × 4 | 77.915 | 0.796 | 0.001 |
Average root | y = 5.379 + 0.867 × 3–4.520 × 5 | 9.754 | 0.809 | 0.001 |
Root length | y = 25.812–36.655 × 1 + 0.687 × 3 + 2.123 × 4 | 7.718 | 0.856 | 0.001 |
Root surface area | y = 12.271–15.441 × 1 + 0.232 × 3 | −13.118 | 0.787 | 0.001 |
Root volume | y = −1.574 + 0.129 × 3 + 1.418 × 4–0.401 × 6 | −33.983 | 0.861 | 0.001 |