Table 5.
Interaction effects between salinity (S), deficit irrigation (DI), and biochar (BC) on the leaf green index, chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids in tomato plants.
| Salinity | Irrigation Levels (%ETc) |
Biochar (%) |
Leaf Green Index (SPAD) |
Chlorophyll a (mg/g−1 FW) | Chlorophyll b (mg/g−1 FW) | Total Chlorophyll (mg/g−1 FW) | Carotenoids (mg/g−1 FW) |
|---|---|---|---|---|---|---|---|
| S 0.9 ds m−1 | 100 | BC0% | 57.80 b | 2.75 bc | 1.12 cd | 3.87 b | 5.34 c |
| BC5% | 60.80 a | 2.86 a | 1.29 a | 4.15 a | 5.77 a | ||
| 80 | BC0% | 48.43 d | 2.61 e | 1.06 de | 3.68 cd | 4.71 fg | |
| BC5% | 58.03 b | 2.82 ab | 1.26 ab | 4.09 a | 5.56 b | ||
| 60 | BC0% | 43.10 f | 2.27 h | 1.02 ef | 3.28 ef | 4.68 fg | |
| BC5% | 45.53 e | 2.63 de | 1.14 c | 3.77 bc | 4.98 de | ||
| 40 | BC0% | 35.97 i | 2.13 i | 0.92 g | 3.06 g | 3.98 i | |
| BC5% | 39.33 h | 2.31 gh | 1.06 de | 3.37 e | 4.25 h | ||
| S 2.3 ds m−1 | 100 | BC0% | 46.37 e | 2.64 de | 1.06 de | 3.71 cd | 4.85 ef |
| BC5% | 50.67 c | 2.69 cd | 1.22 b | 3.92 b | 5.11 d | ||
| 80 | BC0% | 41.17 g | 2.35 g | 1.01 f | 3.35 e | 4.53 g | |
| BC5% | 44.87 e | 2.51 f | 1.08 d | 3.59 d | 4.65 fg | ||
| 60 | BC0% | 36.97 i | 2.24 h | 0.91 g | 3.15 fg | 4.10 hi | |
| BC5% | 33.50 j | 2.05 j | 0.67 h | 2.72 h | 3.66 j | ||
| 40 | BC0% | 31.93 j | 1.90 k | 0.89 g | 2.79 h | 3.60 j | |
| BC5% | 28.23 k | 1.87 k | 0.61 i | 2.48 i | 3.32 k |
According to the LSD test, values with the same letter are not significantly different at the 0.05 probability level.