The unripe convulsions of Chinese cabbage seriously affect the yield. The reason is that the seedlings of cabbage are affected by low temperature. The vernalization leads to the formation of flower buds. The cabbage has three conditions through the vernalization stage.
One is that the seedlings have a certain size, and when the early maturing varieties reach three or more than 0.6 cm thick, the stems may be convulsed by vernalization.
The second is that the seedlings are at a low temperature of 0-10 degrees for a long time, especially at a low temperature of 4-5 degrees.
The third is to go through vernalization after a certain period of time, generally 30-45 days. It can be seen that the prevention of early convulsions should be strictly controlled sowing time can not be sown early, seedling temperature can not be less than 10 degrees for a long time, followed by selection of spring cabbage varieties that are not easy to early convulsions, such as Zhong Gan 11, Zhong Gan 12, and so on. The use of greenhouse nursery, seedling age can not be too long, from the seedling stage to promote vegetative growth, the leaf ball growth faster than the growth rate of calyx, early fertilizer, timely irrigation, etc., do not control the growth due to drought to promote convulsions. Spring early maturing varieties, generally try not to seedlings.
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2. In the usual form and method of ingestion.
3. Marked with a label biological adjustment functions.
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