How to prevent bolting of spring cabbage from economic loss

Cabbage bolting

First, select cabbage varieties with strong winter character.

The varieties of Chunfeng cabbage, spring cabbage and spring cabbage which are strong in winter and not easy to immature bolting are selected, and the cabbage varieties with weak winter nature are difficult to prevent early bolting even if they are sown late and seedlings survive the winter. Therefore, in order to prevent the early bolting of spring cabbage, we must first choose the right variety of spring cabbage.

Second, sowing seeds at the right time

Sowing at the right time is the key to the high yield of cabbage. There is a limit to the sowing time of spring cabbage, within which it is not easy to sow immature bolting. Planting spring cabbage, there is a habit of early sowing, such as early sowing, no matter how strong the winter cabbage will inevitably be immature and bolting. The same variety of spring cabbage has different seedling raising methods and different bolting conditions, such as sowing at the same time in greenhouse and cold bed, the seedling calendar seedling age is the same, but the physiological seedling age is different, because the greenhouse temperature is high, the greenhouse seedling grows fast, the seedling is big, and the bolting rate is high through the vernalization stage, so it is necessary to adopt different sowing time, control temperature and seedling age size according to different seedling raising methods to prevent early bolting.

III. Appropriate age colonization

When planting too early, cabbage seedlings feel low temperature for a long time and slow down, especially after planting, if spring cold is encountered, the bolting rate will be greatly increased. Therefore, spring cabbage should be planted late, when planting, choose first, pull out bolting seedlings, select strong seedlings, the criteria for strong seedlings are: 6 ~ 8 leaves of seedlings, short Hypocotyl and internodes, stout stems, thick leaves, dark green color, well-developed roots, strong resistance, dense top leaves and longer internodes. Dingping.

IV. Combination of promotion and control

Because of the close relationship between seedling age and bolting, it is necessary to strengthen management, especially the control of temperature, light, fertilization, watering, fertilization and watering, control spring in winter, and should not excessively promote seedling growth in winter. Squat seedlings according to seedling conditions and weather conditions to prevent seedlings from growing and cultivate strong seedlings. After the low temperature in the following year, the temperature began to rise and the growth of cabbage gradually speeded up. In this period, the management of fertilizer and water should be strengthened to promote the growth of cabbage, make the vegetative growth exceed the reproductive growth, avoid bolting in advance, and strive for the early listing of spring cabbage with high yield and good benefit.