1, sowing by time
The growth cycle of Chinese cabbage is short, and it can be harvested by tree after being planted for about 20 to 30 days. In autumn and winter, Chinese cabbage is sown from September to 10, and it can be sown in the south until1February.
2. Soil preparation and fertilization
When preparing soil, it can be made into a flat border with a width of 1 to 1.5 meters. There is a lot of rain in summer and autumn, so it should be planted in a high border with a flat surface. The base fertilizer should be mixed with the soil evenly. When the soil is acidic, lime should be added during soil preparation.
Step 3: sow seeds
Generally, when planting in summer and autumn, the method of sowing is adopted. When planting in winter and spring and in greenhouse, seedlings should be raised first and then transplanted. Before sowing, soak in warm water for 12 hours, then accelerate germination at 15 to 20℃, and sow after more than half of the seeds germinate. Before sowing, water, wet the border and sow, and cover with soil 1 cm.
Fourth, seedling management
After the emergence of Chinese cabbage, the soil should be kept moist, and the place with dense emergence should be thinned twice. When two real leaves grow, the first thinning should be carried out, and the seedling spacing should be two centimeters, and the weak seedlings and diseased seedlings should be removed. When 3-4 true leaves grow, carry out the second thinning, and the spacing between seedlings is 5-6 cm.
Five, water and fertilizer management
Chinese cabbage can be harvested during vegetative growth, at which time it needs more nitrogen and less phosphorus and potassium fertilizer. In plots with sufficient base fertilizer, after Chinese cabbage enters the vigorous growth period, a small amount of nitrogen fertilizer should be applied topdressing, and urea can be used per mu from 10 to 15 kg. Phosphorus and potassium fertilizer are fully applied in the base fertilizer, and potassium dihydrogen phosphate and amino acid foliar fertilizer can be sprayed on the leaves in the later stage.