Detailed Explanation of Key Technical Points for Overwintering Cabbage Cultivation

Cabbage is a relatively popular vegetable. At present, there are many overwintering cabbage varieties, and quality varies greatly. Many overwintering cabbages do not bring high returns. So what are the techniques for overwintering cabbage cultivation?

1. Seedling raising: Overwintering cabbage can be sown from late September to early October. Early seedling raising forms large seedlings with strong overwintering ability, but seedlings must not be raised too early blindly, as large seedlings are prone to vernalization and bolting. Therefore, the seedling raising time should be controlled from late September to early October. Use 40 sq m to 50 sq m of seedbed per mu, level the seedbed, evenly broadcast 1 kg of diammonium phosphate over each 50 sq m of seedbed and mix it evenly with the seedbed soil, water thoroughly to saturate the soil moisture, and after the water seeps down, sow evenly, using 60 g of seed per mu. During sowing, distribute the seeds evenly and sow thinly, then cover with 0.2 cm of fine soil, cover with plastic film to preserve moisture, and remove the plastic film after three days.

2. Seedbed management: After emergence, keep the seedbed alternately dry and wet. After 25 days to 35 days, when the seedlings grow to 3 to 5 leaves, they can be transplanted to the field.

3. Transplanting: Transplant the seedlings from late October to early November, with a plant-row spacing of 45×40 cm, planting 3500 to 3800 plants per mu. Water immediately after planting. If conditions permit, apply 50 kg of diammonium phosphate or 3 to 5 cubic meters of chicken manure per mu as base fertilizer, applied during land preparation.

4. Plastic film: From late November to early December, cover the cabbage seedlings to preserve moisture. Do not pull the cabbage seedlings out, and do not water in winter.

5. Small arch shed: For an earlier market period, cover with a small arch shed in mid-January. This cultivation model gives high returns. The small arch shed does not need to be covered with wheat straw or grass mats. Remove the small arch shed at the end of March.

6. Spring management: In mid-to-late March, pull the seedlings out of the plastic film and press down soil. If the plastic film is not removed, it can preserve moisture and raise temperature. At the end of March, water according to the soil moisture condition, and when watering, flush-apply 25 kg of ammonium bicarbonate per mu with the water.

7. Head-forming stage management: In mid-to-late March, pull the seedlings out of the plastic film and press down soil. If the plastic film is not removed, it can preserve moisture and raise temperature. At the end of March, water according to the soil moisture condition, and when watering, flush-apply 25 kg of ammonium bicarbonate per mu with the water.

Overwintering cabbage requires attention to heat preservation work, so as to avoid temperatures that are too low and affect the development of cabbage.