Table 5.
Correlation analysis between plant physiological indicators and tomato yield.
| Indices | Pn | Ci | Tr | Gs | Fv/Fm | Fv/Fo | ABS/CSm | TRo/CSm | ETo/CSm | DIo/CSm | Yield |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pn | 1 | ||||||||||
| Ci | 0.960 | 1 | |||||||||
| Tr | 0.918 | 0.936 | 1 | ||||||||
| Gs | 0.660 | 0.759 | 0.696 | 1 | |||||||
| Fv/Fm | 0.899 | 0.895 | 0.869 | 0.626 | 1 | ||||||
| Fv/Fo | 0.939 | 0.975 | 0.932 | 0.663 | 0.911 | 1 | |||||
| ABS/CSm | 0.950 | 0.947 | 0.903 | 0.635 | 0.829 | 0.949 | 1 | ||||
| TRo/CSm | 0.962 | 0.964 | 0.925 | 0.661 | 0.857 | 0.961 | 0.969 | 1 | |||
| ETo/CSm | 0.904 | 0.905 | 0.886 | 0.463 | 0.854 | 0.943 | 0.883 | 0.900 | 1 | ||
| DIo/CSm | −0.775 | −0.816 | −0.871 | −0.608 | −0.795 | −0.860 | −0.729 | −0.774 | −0.859 | 1 | |
| Yield | 0.876 | 0.826 | 0.775 | 0.485 | 0.725 | 0.821 | 0.843 | 0.817 | 0.800 | −0.686 | 1 |
Note: Pearson correlation coefficient ranging from 0.8 to 1.0 indicates very strong correlation, from 0.6 to 0.8 indicates strong correlation, from 0.4 to 0.6 indicates medium correlation, from 0.2 to 0.4 indicates weak correlation, and from 0.0 to 0.2 indicates very weak correlation or no correlation. “-” represents a negative correlation.