Choose excellent varieties in the early spring cold shed cultivation can choose varieties with strong cold resistance, strong disease resistance, strong winter, spring open field planting can choose varieties of early maturity, high yield, strong disease resistance.
To prepare the seedbed bed, the soil should be fertile. In the previous year, the pastoral soil of cruciferous vegetables was not planted, and the fully-fertilized farmyard manure should be used to match the appropriate amount of ternary compound fertilizer. The seedbed can be thoroughly disinfected with 50% Fumei double wettable powder before sowing, and the dosage per square meter is about 10 grams.
The suitable sowing date for timely sowing spring cabbage is from late December to mid-January, and the seedlings in the greenhouse or the improved seedlings are used. Generally, the early-maturing varieties have a planting density of 4,500 to 5,000, and a medium-maturing variety of 3,500 to 4,000. The amount of the used seeds is about 50 grams. Before sowing, the seeds generally do not need to be germinated, and the seeds can be broadcast live.
Before the seedling bed is managed, the temperature of the greenhouse or impotence should be maintained at 15 °C ~ 25 °C. After 5 days of sowing, the seedlings can be released. At this time, it is necessary to pay attention to the timely release of the wind to keep the temperature at 10 °C ~ 20 °C. When the seedlings grow to 3 true leaves (in mid-February), the seedlings should be divided once. The temperature of the seedbed is generally between 8 °C and 20 °C, and it can be used for low-temperature "smelting" before the seedlings are planted in March. . After that, it is planted according to the cultivation mode and weather conditions.
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