How to prevent spring celery before convulsions
After the celery seedling grows 3 to 4 leaves, if it encounters a low temperature below 10°C, it can pass through the vernalization stage in about 12 days and undergo flower bud differentiation under long daylight. The longer the time at low temperature, the higher the rate of convulsions. To prevent spring celery from convulsions, the following measures should be taken:
Variety selection Choose cold-resistant, early winter, late bolting, suitable for spring sowing varieties, such as big-leaf celery, Jinnan real celery, milky white celery, glass crisp, Italian celery and so on.
Timely planting of celery with greenhouses can be planted before the beginning of March; open celery sowing can be planted on sunny days from the end of February to mid-April. Greenhouse seedlings should be mulched with mulch filming in advance, and the soil temperature of 10 cm deep can be planted above 10°C. The Chinese celery is easy to pick up before the rain, and the safe spring sowing period is after the Ching Ming. When Celery celery is above 15°C, the colonization will be later and there will be no convulsions. If the colonization is too early, convulsions will be earlier; when the temperature is below 15°C, the convulsions will be high regardless of the colonization time.
Cultivate strong seedlings to control the temperature during the nursery and reduce the low temperature time below 10°C. Supply suitable nitrogen fertilizer and moisture, delay flower bud differentiation, promote multi-differentiation leaves. After sowing, the seedlings should be covered with membranes and small sheds, and the temperature before emergence can be appropriately high, prompting emergence. After emergence, during the day, pay attention to ventilation and cooling, the temperature does not exceed 25 °C, at night it is best not less than 8 °C.
Spraying the growth regulator with the chlorella solution of 400010-6 to 800010-6 can inhibit the celery from twitching and flowering.
Timely harvesting of the spring celery does not enter the heart and leaf erect period. The growing point has differentiated the flower buds and can only rely on the extravagant outer leaves and the newly emerged tender pods as the product. The whole plant is cut off once when the tenon is 10 centimeters long.
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