Table 2 Treatments of the experiment.
Treatments | Straw mulching mode | N application amount/(kg hm−2) | The amount of P and K /(kg hm−2) | Irrigation quota |
|---|---|---|---|---|
CK | Traditional cultivation mode | 225 (NH) | The P fertilizer was calcium superphosphate, which application amount was 150 kg hm−2 at the local level (measured by P2O5). K fertilizer was potassium chloride, and the amount was 45 kg hm−2 (measured in K2O) at the local level. P-fertilizer, K-fertilizer and 50% N were applied at one time as base fertilizer, and the remaining N was applied at the rapid growth stage | Irrigated by Yellow River water, and the salinity 0.608 g L−1. Irrigation was done 3 times in the whole growth period of summer maize. The irrigation quota for a single irrigation was 135 mm. A 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) | ||
BNL | 135 (NL) | |||
BNM | 180 (NM) | |||
BNH | 225 (NH) | |||
SN0 | Treatment S: Straw layers with 5 cm thicknesses were buried at 35 cm below the ground | 0 (N0) | ||
SNL | 135 (NL) | |||
SNM | 180 (NM) | |||
SNH | 225 (NH) |
