1, sowing
Kohlrabi can be planted directly or transplanted, but in order to manage and make full use of the land, seedlings are often transplanted. Like cold environment, suitable growth temperature 15-20 degrees. Higher temperature in the early stage is beneficial to the growth of its seedlings, and lower temperature in the later stage is beneficial to the expansion of fleshy roots. Its sowing time depends on the local climate conditions. The seedling raising method is the same as that of Chinese cabbage. Select a good plot for soil preparation and fertilization, and then sow.
2. Soil preparation and transplantation
Kohlrabi is a root vegetable, so loam with deep soil layer and convenient irrigation and drainage should be chosen as the planting land, and the previous crop should be a vegetable field or rice field that has not been planted with Cruciferae. Apply decomposed organic fertilizer 1500 kg per mu, and 50 kg compound fertilizer as base fertilizer.
When planting, it should be planted reasonably and densely according to the variety, usually by opening holes. When planting, the straight roots should be buried in the soil, then slightly lifted to straighten the roots, and then watered.
3. Fertilizer and water management
If the weather is dry after planting, it needs to be watered 1-2 times a day. After survival, water should be properly controlled according to weather conditions. Before the fleshy roots swell, the straight roots will grow very deep, and the soil will be moist after swelling. When fleshy roots form late, water should be controlled. Generally, watering should be stopped within one week of harvest to enrich the tissue and improve the quality.
Top dressing once after planting 10, and once a week thereafter. When fleshy roots swell, 1-2 fertilizer, especially potassium fertilizer, should be supplemented. Before each fertilization, loosen the soil and weed, and spray water after fertilization 1-2 days, which can promote the dissolution of fertilizer for crops to absorb. Cultivate the soil 1-2 times in the growth period to avoid the bare roots affecting the quality.
4, pest control
The main diseases of kohlrabi are soft rot, virus disease, downy mildew and root rot, which can be controlled by spraying corresponding chemicals. Pests include Pieris rapae and aphids. Pieris rapae can be controlled by spraying Jinyun biological insecticide, and aphids can be controlled by aphids.
Planting time:
Kechun and autumn can be cultivated in the open field, and autumn sowing is the main method. Sowing can be carried out from late July to 10, and harvesting can be completed from mid-September to March of the following year.