Table 1.
Experiment treatments.
| Treatments | Straw mulching mode | N application amount/(kg·hm−2) | P and K application amount/(kg·hm−2) | Irrigation quota |
|---|---|---|---|---|
| CK | Traditional cultivation | 225(N3) | The P-fertilizer was DAP, and the amount was 150 kg·hm−2 (calculated as P2O5). K-fertilizer was KCl, and the amount was 45 kg·hm−2 (calculated as K2O). P-fertilizer, K-fertilizer and 50% N-fertilizer were applied once as the base fertilizer, and the remaining N-fertilizer was applied in the jointing stage | Irrigated by Yellow River water, and the salinity was 0.608 g·L−1. Irrigation was done for 3 times during growth period. The irrigation quota for a single was 135 mm. Gasoline pump was used to quantitatively extract water from the canal |
| BN0 | Treatment B: Surfaces were covered with 5 cm thick straw in rows after film-coated planting | 0(N0) | ||
| BN1 | 135(N1) | |||
| BN2 | 180(N2) | |||
| BN3 | 225(N3) | |||
| SN0 | Treatment S: Straw layers with 5 cm thicknesses were buried at 35 cm below the ground | 0(N0) | ||
| SN1 | 135(N1) | |||
| SN2 | 180(N2) | |||
| SN3 | 225(N3) |