| Shoot biomass | Root biomass | Shoot/root | Total biomass | Root length | Grain yield | WUE-yield |
---|---|---|---|---|---|---|---|
 | g pot−1 | g pot−1 |  | g pot−1 | cm | g pot−1 | g L−1 |
Drought stress (D) | |||||||
 D-C | 19.80 ± 1.21 a | 3.24 ± 0.25 a | 6.35 ± 0.30 a | 23.04 ± 1.40 a | 28.08 ± 1.72 b | 10.46 ± 0.64 a | 0.51 ± 0.03 b |
 D-L | 14.08 ± 0.85 b | 3.08 ± 0.18 a | 4.66 ± 0.21 b | 17.17 ± 0.98 b | 34.17 ± 1.74 a | 8.61 ± 0.61 b | 0.65 ± 0.05 a |
 D-H | 10.23 ± 0.74 c | 2.13 ± 0.15 b | 4.96 ± 0.29 b | 12.36 ± 0.86 c | 31.04 ± 2.37 ab | 6.00 ± 0.29 c | 0.64 ± 0.03 a |
Salinity stress (S) | |||||||
 Control | 15.56 ± 0.74 a | 3.21 ± 0.12 a | 4.90 ± 0.18 b | 18.76 ± 0.82 a | 34.88 ± 1.83 a | 9.34 ± 0.46 a | 0.69 ± 0.03 a |
 Salinity | 13.86 ± 1.22 a | 2.42 ± 0.21 b | 5.75 ± 0.29 a | 16.28 ± 1.39 b | 27.31 ± 1.12 b | 7.37 ± 0.55 b | 0.52 ± 0.03 b |
Biochar (B) | |||||||
 B0 | 12.33 ± 0.82 b | 2.43 ± 0.17 b | 5.20 ± 0.27 a | 14.76 ± 0.96 b | 31.80 ± 2.01 a | 7.89 ± 0.48 b | 0.57 ± 0.04 b |
 B1 | 14.09 ± 1.03 b | 2.82 ± 0.19 ab | 5.09 ± 0.29 a | 16.91 ± 1.16 b | 33.17 ± 2.29 a | 8.13 ± 0.65 ab | 0.59 ± 0.04 b |
 B2 | 17.70 ± 1.53 a | 3.20 ± 0.28 a | 5.68 ± 0.35 a | 20.90 ± 1.74 a | 28.31 ± 1.60 a | 9.05 ± 0.78 a | 0.66 ± 0.03 a |
ANOVA | |||||||
 D | < 0.001 | < 0.001 | < 0.01 | < 0.001 | < 0.05 | < 0.001 | < 0.001 |
 S | 0.051 | < 0.001 | < 0.01 | < 0.05 | < 0.001 | < 0.001 | < 0.001 |
 B | < 0.001 | < 0.01 | 0.438 | < 0.001 | 0.090 | < 0.05 | < 0.05 |
 D × S | 0.059 | < 0.05 | 0.820 | < 0.05 | < 0.05 | < 0.001 | < 0.001 |
 D × B | < 0.05 | 0.401 | 0.534 | < 0.05 | < 0.05 | < 0.001 | < 0.001 |
 S × B | < 0.05 | < 0.05 | 0.853 | < 0.05 | 0.714 | < 0.01 | < 0.01 |
 D × S × B | 0.682 | 0.499 | 0.716 | 0.633 | < 0.05 | 0.160 | 0.160 |