First, varieties. 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.
Second, nursery
1, sowing time. According to the time-to-market requirements and the variety used to determine the sowing date, greenhouse cultivation block early Spring off-season, to choose early maturing varieties, calendar seedling age of about 60 days, physiological seedlings six to seven true leaf colonization, in mid-January to February Upper and middle greenhouse sowing seedlings.
2, the seed solution. Seedlings of A. paniculata are the same as common Ganlan seeds. The seed coat is thin and easy to germinate. It is best to sow the seeds. If the soaking seeds are sown, soaking for 2-4 hours, and the soaking time is too long, the seedlings will be unearthed and grow unfavorably.
3, sowing. Sowing should be selected sunny heat like, first planted bed pouring foot water, the water seepage after the seed evenly sowing. Use 50 grams per acre and plant 3-4 grams per square meter. After the sowing, cover fine soil 1-1. 5 centimeters, and maintain the temperature during the day at 20-25 °C.
4, seedling management. When the seedling leaves Qiziziping, the daytime temperature is controlled at 18-20°C and 8-10°C at night. 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, it is advisable that the daytime temperature control should be no less than 10°C at night around 20°C, and six to seven true leaves be planted.
Third, colonization
1, soil preparation fertilization. The roots of P. armandii spread widely and deeply, so deep plowing should be done before planting in the spring and plowing around 25 cm. The ridge should be marked with 60-65 cm wide ridges, and the ridges are usually made into 1-1. 20-meter ridges. Purple bark is a fertilizer crop, full base fertilizer, usually Mushi quality farm fertilizer 5000 kg, 15 kg of ammonium phosphate as a base fertilizer.
2, colonization. During the colonization period, the greenhouse cultivation can be planted in mid-March, and the greenhouse cultivation can be covered with multiple layers, which can be planted from 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 appropriate density of colonization, planting width of 1 meter planted 2 rows, spacing 30-35 cm, ridge planting 65 cm of planting distance, 2 rows of abducted seedlings, spacing 40 cm.
Fourth, field management. Temperature management, within 7-10 days after planting, 25-27 °C during the day, 13-15 °C during the night, increase the temperature of the greenhouse, and increase the slow seedlings. After easing the seedlings, it is controlled at 15-20°C during the day and 10-13°C at night. Into the rosette period and the ball stage, during the day 18-20 °C, night 12-15 °C, water and fertilizer management, 10-15 days after planting slow seedlings, joint irrigation topdressing urea, 15-20 kg per mu, rosette mid-term connection Watering the second fertilizer, 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, it is necessary to choose a sunny weather for watering, and not water it on cloudy days.
V. 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 medium-maturing varieties is 2000-4000 kg.
Six, pest control. Blight occurs easily during the seedling stage and occurs during greenhouse nursery. The base of the victim's seedlings becomes darker and smaller, or forms a black pitted spot, resulting in the collapse of death. The disease is a soil-borne disease. It should be selected on the bed of bacteria-free seedlings, or refer to the soil disinfection techniques of vegetable bed seedlings with medicinal soil coverage, and properly control the irrigation. Pay attention to air and light to prevent the disease from happening.
Summer and Autumn cultivation: Soft rot occurs in the rosette and ball stage. At the beginning, water-soaked spots appear at the base of the outer leaves or leaf bulbs. The outer leaves wrap at noon and recover sooner or later. After several days, the outer leaves no longer recover, the diseased part begins to rot, and the leaf bulbs are exposed or the plant base gradually rots and becomes muddy. Bad smell. In addition, there is black rot, which is a bacterial disease. Because the bacteria invade the leaf margin from the water hole, they have "V" shaped lesions on the leaves. If they invade from the wound, they can spread on both sides or inside at the invading site to make the surrounding leaves yellow or die.
To prevent and treat these two kinds of bacterial diseases, we should mainly avoid the wounds caused by pests and pay attention to irrigation to prevent them from being affected. At the beginning of the disease, spray 350ml of ammonia-copper water solution or 72% of streptomycin sulfate powder 4000 times every 7-10. Once a day, continue to control 2-3 times.
For the cabbage caterpillar, diamondback moth, lantana xylostella, Gan Lanjing can be sprayed with 40% dimethoate EC 1000 times, or 2.5% 50% cypermethrin 3000-4000 times liquid and other highly effective low-toxic insecticides.
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