Table 7 Impact of reduced irrigation and potassium level on transpiration rate and stomatal conductance in two cotton growing seasons 2018 and 2019
Cotton Cultivars | Transpiration rate /(mmol (H2O)·m−2·s−1) | Stomatal conductance /(mmol (CO2)·m−2·s−1) | ||||||
|---|---|---|---|---|---|---|---|---|
Reduced irrigation | Normal irrigation | Reduced irrigation | Normal irrigation | |||||
K level (0 kg·ha−1) | K level (50 kg·ha−1) | K level (0 kg·ha−1) | K level (50 kg·ha−1) | K level (0 kg·ha−1) | K level (50 kg·ha−1) | K level (0 kg·ha−1) | K level (50 kg·ha−1) | |
Cotton growing season (2018) | ||||||||
 BH-212 | 2.93 ± 1.0a | 1.79 ± 0.87a | 3.67 ± 0.82a | 1.87 ± 0.54a | 108.5 ± 9.73a | 111.0 ± 5.07a | 116.5 ± 6.91a | 134.7 ± 7.72a |
 IUB-2013 | 3.81 ± 1.43b | 2.02 ± 1.25a | 4.53 ± 1.52a | 2.14 ± 0.75a | 131.6 ± 12.13b | 138.7 ± 3.55b | 141.8 ± 5.14ab | 159.4 ± 12.27ab |
 CIM-554 | 4.02 ± 1.17b | 2.18 ± 1.33a | 4.75 ± 1.07a | 3.41 ± 1.17a | 136.5 ± 2.4b | 147.3 ± 9.66b | 146.7 ± 6.99b | 180.7 ± 12.44b |
 CYTO-124 | 3.94 ± 1.43b | 2.22 ± 0.97a | 4.67 ± 1.55a | 2.33 ± 1.11a | 127.2 ± 3.59b | 145.7 ± 9.14b | 149.6 ± 3.63b | 170.5 ± 6.95b |
 FH-142 | 3.95 ± 1.69b | 2.25 ± 1.02a | 4.77 ± 1.13a | 2.26 ± 0.67a | 140.9 ± 7.38b | 151.8 ± 5.50b | 152.4 ± 23.58b | 183.4 ± 14.25b |
Cotton growing season (2019) | ||||||||
 BH-212 | 2.68 ± 0.99a | 1.67 ± 0.87a | 3.52 ± 0.81a | 2.08 ± 0.95a | 103.9 ± 10.86a | 107.33 ± 4.68a | 114.3 ± 5.56a | 130.75 ± 9.35a |
 IUB-2013 | 3.65 ± 0.68b | 2.14 ± 0.9b | 4.40 ± 1.51b | 2.04 ± 0.36a | 122.4 ± 12.67b | 134.55 ± 6.56b | 139.5 ± 4.91ab | 153.65 ± 9.38ab |
 CIM-554 | 3.48 ± 0.43b | 2.12 ± 1.36b | 4.48 ± 1.29b | 3.13 ± 0.83b | 134.1 ± 1.49b | 141.88 ± 8.25b | 143.85 ± 7.47b | 168.5 ± 11.1b |
 CYTO-124 | 3.50 ± 1.31b | 2.10 ± 0.98b | 4.43 ± 1.52b | 2.20 ± 0.50a | 120.3 ± 2.70ab | 142.82 ± 8.94b | 145.78 ± 4.72b | 165.07 ± 6.14b |
 FH-142 | 3.64 ± 0.51b | 2.20 ± 0.75b | 4.36 ± 1.17b | 2.18 ± 0.72a | 134.0 ± 9.83b | 148.4 ± 11.21b | 149.05 ± 24.33b | 171.8 ± 15.16b |