Table 2.
Effects of Mg application on chlorophyll content, rubisco activity, transpiration rate (Tr), stomatal conductance (Gs), and intercellular CO2 concentration (Ci) in 2018 and 2019.
| Year | Treatment (kg/hm2) | Chlorophyll content (mg·g-1 FW) | Rubisco activity (μmol·g-1·min-1 FW) | Tr (mmol·m-2·s-1) | Gs (mol·m-2·s-1) | Ci (μmol·mol-1) |
|---|---|---|---|---|---|---|
| 2018 | CK | 3.41 ± 0.18d | 5.89 ± 0.41d | 8.31 ± 0.44b | 0.28 ± 0.01c | 263.3 ± 11.26c |
| Mg50 | 4.31 ± 0.11c | 7.12 ± 0.33c | 9.01 ± 0.56a | 0.34 ± 0.01b | 279.4 ± 16.12b | |
| Mg100 | 5.28 ± 0.07b | 8.34 ± 0.36b | 9.07 ± 0.52a | 0.33 ± 0.01b | 283.6 ± 7.36b | |
| Mg150 | 6.13 ± 0.24a | 9.71 ± 0.18a | 9.21 ± 0.43a | 0.41 ± 0.01a | 298.2 ± 14.11a | |
| Mg200 | 6.04 ± 0.22a | 9.58 ± 0.41a | 9.13 ± 0.51a | 0.42 ± 0.02a | 295.5 ± 11.66a | |
| 2019 | CK | 3.55 ± 0.26c | 5.89 ± 0.41d | 8.31 ± 0.74c | 0.28 ± 0.014d | 265.2 ± 16.33d |
| Mg50 | 5.04 ± 0.21b | 7.12 ± 0.33c | 9.02 ± 0.76b | 0.35 ± 0.007c | 272.4 ± 15.88c | |
| Mg100 | 5.66 ± 0.48b | 8.34 ± 0.36b | 9.11 ± 0.83b | 0.34 ± 0.009c | 282.5 ± 17.51bc | |
| Mg150 | 6.94 ± 0.31a | 9.98 ± 0.41a | 9.34 ± 0.81a | 0.40 ± 0.015a | 301.2 ± 17.85a | |
| Mg200 | 6.73 ± 0.32a | 9.71 ± 0.38a | 9.25 ± 0.73ab | 0.38 ± 0.012ab | 287.5 ± 15.03b |
Significant differences were detected by different letters at P ≤ 0.05.