Table 5.
Effects of N application on water use efficiency (WUE).
| Treatment | Soil water storage at sowing stage (mm) |
Rainfall in growth period (mm) |
Irrigation amount (mm) |
Soil water storage at maturity (mm) |
Water consumption Amount in growth period (mm) |
Water use efficiency (kg ha–1 mm–1) |
|
|---|---|---|---|---|---|---|---|
| 2020–2021 | N0 | 441.30 | 205.00 | 60.00 | 311.49 | 394.81 c | 18.65 c |
| N90 | 288.86 | 417.44 b | 20.95 b | ||||
| N180 | 291.20 | 415.10 b | 22.75 a | ||||
| N210 | 282.78 | 423.52 b | 22.74 a | ||||
| N240 | 234.31 | 471.98 a | 22.94 a | ||||
| N270 | 280.97 | 425.33 b | 23.26 a | ||||
| N300 | 308.32 | 397.98 c | 18.71 c | ||||
| 2021–2022 | N0 | 327.70 | 378.60 c | 19.23 d | |||
| N90 | 291.40 | 414.90 ab | 20.66 c | ||||
| N180 | 284.44 | 421.85 a | 21.16 c | ||||
| N210 | 279.49 | 426.81 a | 22.42 b | ||||
| N240 | 298.62 | 407.68 b | 23.06 a | ||||
| N270 | 328.00 | 378.30 c | 23.07 a | ||||
| N300 | 331.74 | 374.56 c | 18.88 d | ||||
| F-value | |||||||
| Year (Y) | ns | ns | ns | * | * | * | |
| Nitrogen (N) | ns | ns | ns | ** | ** | ** | |
| Y × N | ns | ns | ns | ns | * | ns | |
Different normal letters after the same column of numbers indicate that different sowing rates have significant differences at the level of 0.05 (LSD test). Different capital letters after the same column of numbers indicate that different years have significant differences at the level of 0.05 (LSD test). *Significant at the 0.05 probability level. **Significant at the 0.01 probability level.