Table 1. Experimental treatments in the field.
Ridge tillage was with ridge scope of 120 cm, ridge surface width of 100 cm, ridge ditch width of 20 cm, and ridge height of 15 cm (Fig. 1). Summer maize was sowed in ridge surface, with row spacing of 60 cm and plant spacing of 24.5 cm, at a plant density of 67,500 plants ha−1; Conventional tillage was conventional flat planting with row spacing of 60 cm and plant spacing of 24.5 cm, at a plant density of 67,500 plants ha−1.
| Water treatment | Planting pattern | Abbreviation |
|---|---|---|
| Waterlogging at the third leaf stage for 6 days | Conventional tillage | W-V3 |
| Ridge tillage | W-V3+R | |
| No waterlogging | Conventional tillage | CK |