Table 3.
Characteristic parameters of grain-filling curve fitted by using the logistic equation, duration of lag periods (Plag), active grain-filling period (Pactive), maturation drying period (Pdrying), grain-filling rate during lag periods (Vlag), active grain-filling period (Vactive), and maturation drying period (Vdrying) that resulted from the water deficit in 2015.
| Treatment | Position | Plag (days) | Vlag (mg d−1 kernel−1) | Pactive (days) | Vactive (mg d−1 kernel−1) | Pdrying (days) | Vdrying (mg d−1 kernel−1) |
|---|---|---|---|---|---|---|---|
| CK | Inferior | 17.4 | 3.8 | 22.9 | 7.8 | 28.5 | 2.3 |
| V6−8 | 17.0 | 4.0 | 25.4 | 7.4 | 31.6 | 2.2 | |
| V9−12 | 20.3 | 3.0 | 22.3 | 7.3 | 27.8 | 2.1 | |
| V13−T | 17.9 | 2.9 | 19.5 | 7.4 | 24.2 | 2.2 | |
| R1−2 | 19.7 | 3.1 | 19.7 | 8.5 | 24.5 | 2.5 | |
| CK | Superior | 17.5 | 4.2 | 23.8 | 8.4 | 29.6 | 2.5 |
| V6−8 | 17.1 | 4.1 | 23.9 | 8.0 | 29.8 | 2.4 | |
| V9−12 | 18.1 | 3.7 | 23.0 | 8.0 | 28.7 | 2.3 | |
| V13−T | 17.2 | 3.9 | 25.6 | 7.2 | 31.9 | 2.1 | |
| R1−2 | 18.8 | 3.8 | 22.2 | 8.9 | 27.6 | 2.6 |
CK, well-irrigated treatment; V6−8, water deficit during the 6–8-leaf stage; V9−12, water deficit during the 9–12-leaf stage; V13−T, water deficit from the 13-leaf stage to tasseling stage, R1−2, water deficit from the silking stage to blister stage.