Table 2.
Treatment of mulching and basal fertilizer application method in this study.
| Treatment | Mulching | Fertilizer rate (N-P-K kg ha-1) | Nitrogen application depth (cm) | Basal fertilizer application method |
|---|---|---|---|---|
| CK | No | 0-80-80 | – | First, spread the P and K fertilizer over the soil surface. Second, turn over the soil and mix the fertilizer into the soil. |
| T0 | Yes | 160-80-80 | – | First, spread the basal N, P, and K fertilizer over the soil surface. Second, turn over the soil and mix the fertilizer into the soil. Third, cover the soil surface layer of the ridges (15 cm high × 60 cm wide) with plastic film mulch immediately after preparation. |
| T1 | No | 160-80-80 | 6 | First, spread the P and K fertilizer over the soil surface. Second, turn over the soil and mix the fertilizer into the soil. Third, manually dig ditches to 6 cm depth. Fourth, perform band placement of basal N fertilizer and mark the fertilization position immediately after preparation. |
| T2 | Yes | 160-80-80 | 6 | First, spread the P and K fertilizer over the soil surface. Second, turn over the soil and mix the fertilizer into the soil. Third, manually dig ditches to 6 cm depth. Fourth, perform band placement of basal N fertilizer. Fifth, cover the soil surface layer of the ridges (15 cm high × 60 cm wide) with plastic film mulch and mark the fertilization position immediately after preparation. |
| T3 | No | 160-80-80 | 12 | First, spread the P and K fertilizer over the soil surface. Second, turn over the soil and mix the fertilizer into the soil. Third, manually dig ditches to 12 cm depth. Fourth, perform band placement of basal N fertilizer and mark the fertilization position immediately after preparation. |
| T4 | Yes | 160-80-80 | 12 | First, spread the P and K fertilizer over the soil surface. Second, turn over the soil and mix the fertilizer into the soil. Third, manually dig ditches to 12 cm depth. Fourth, perform band placement of basal N fertilizer. Fifth, cover the soil surface layer of the ridges (15 cm high × 60 cm wide) with plastic film mulch and mark the fertilization position immediately after preparation. |