Variety
There are fewer varieties of Zilan, and the varieties currently used in production include Zigan No.1, Hongmu, Zaohong, and Ziyang Cabbage and Purple Cabbage.
Nursery
Sowing time depends on the time of the market and the variety used to determine the sowing date, greenhouse cultivation in early spring, this time to choose early maturing varieties, calendar seedling age of about 60 days, physiological seedlings six to seven true leaf colonization.
Seeds to solve the licorice seeds and common Ganlan seeds, seed coat thin easy to germinate, it is best to sow the seeds, if soaking seed germination sowing, soaking for 2-4 hours, soaking time is too long, unfavorable to the emergence of seedlings and growth.
Seeding sowing should be selected sunny and warm weather, the first seedbed bed pouring sole water, water seepage after the seed evenly sowing. Use 50 grams per acre and plant 3-4 grams per square meter. After sowing, finely ground 1-1.5 centimeters, and the temperature during the day is maintained at 20°C-25°C.
Seedling management in the seedlings out of Qi, cotyledon flattening, the daytime temperature is controlled at 18 °C -20 °C, night 8 °C -10 °C. Usually about 30 days after sowing. When the seedlings grow one or two true leaves, the seedlings are transplanted, and transplanting is carried out according to the row spacing of 8 cm and 8 cm. In the gentle seedling period, it is appropriate to have a temperature of 25°C during the day. After easing the seedlings, the pupa temperature should be controlled at about 20°C during the day and not less than 10°C at night. Six to seven true leaves should be planted.
Colonization
The land fertilized in the soil preparation site is wide and deep, so the land should be deeply turned and plowed for about 25 cm before cultivation. The ridge should be marked with 60-65 cm wide ridges, and the ridges should usually be made 1-1.20 meters. Purple bark is a fertilizer crop, full base fertilizer, usually 5000 kg per mu high-quality farm fertilizer, 15 kg of diammonium phosphate as base fertilizer.
Planting greenhouse cultivation to adopt multi-layer coverage, can be planted in late March to early April. The seedbed should be irrigated the day before planting, and the root system should be soiled when the seedlings are raised the next day. After planting, the water must be poured and the plants must be sealed. The depth of planting leaves the leaves on top, and the heart does not bury the soil as the standard. The suitable density for planting was 1 meter wide, 2 rows planted, 30-35 centimeters of plant spacing, 65 centimeters of ridge spacing, and 2 rows of abducted seedlings, 40 centimeters spacing.
Field management
Temperature management, within 7-10 days after planting, 25°C-27°C during the day and 13°C-15°C during the night, increase the temperature of the greenhouse and increase the growth. After easing the seedlings, it is controlled at 15°C-20°C during the day and 10°C-13°C at night. Into the rosette period and the ball stage, during the day 18 °C -20 °C, night 12 °C -15 °C, water and fertilizer management, 10-15 days after the establishment of slow seedlings, joint irrigation topdressing urea, 15-20 kg per mu, rosette Medium-term joint watering the second time dressing, apply 15-20 kg of urea per acre, or 20 kg of ammonium sulfate, 10 kg of potassium sulfate. During the ball period, pay attention to timely irrigation and keep the soil moist. However, water should be selected for sunny weather and water should not be poured on cloudy days.
Harvesting
After the Zilanlan leafball grows, it should be harvested according to its own maturity and market needs, but it is appropriate to harvest the leaf ball in a tight and real-time manner. Usually, the yield of early maturing varieties is 1500-3000 kg per mu and that of mid-maturing varieties is 2000-4000 kg.
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