Spring cabbage unripe bolting
Cultivation of Chinese cabbage in the spring sometimes leads to unripe convulsions and is less likely to cause balling.
Immature convulsions have a direct relationship with variety, growth period, and temperature. Spring cabbage can quickly complete the vernalization process when it encounters low temperatures of 2°C～10°C or sudden high temperatures during different growth periods; in the condition of 10°C～15°C, it can complete vernalization for a long time. In addition, the duration of the vernalization effect of different species and the required temperature are also different. In the spring, the low temperature and long days of sunshine shorten, and it is easy to meet the temperature and light conditions needed to complete the vernalization.
Measures to prevent early convulsions:
1. Strictly control the sowing date, not to sow early, to stagger the low-temperature climate, grow before and after the final frost at seedling stage, sowing or transplanting when the night temperature is not lower than 8°C.
2. Select spring cabbage varieties that are not easily convulsed early. Use greenhouses or simple greenhouse nursery to avoid the vernalization of cabbage seed germination.
3. Do a good job of fertilizer and water management, early recovery fertilizer, fertilizer and water can reduce the case of convulsions.
4. The seedling age should not be too long. From the seedling stage, it is necessary to promote vegetative growth and inhibit the growth of calyx. Early-maturing varieties planted in spring are generally not seedlings.
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