In the cultivation of celery, raising the temperature of the celery seedlings and avoiding the low temperature through the vernalization stage is one of the effective measures to reduce the pre-seizure of celery. The celery seedlings are now in winter. If the daytime temperature in Yangshuo is kept at 15 degrees Celsius to 20 degrees Celsius, and the nighttime temperature is maintained at 8 degrees Celsius to 10 degrees Celsius, it can avoid passing through the vernalization stage. To achieve this goal, the following measures are usually taken: appropriate late sowing. To raise the seedlings in the late night to avoid the cold season and raise the seedlings when the temperature is warmer, thus ensuring a higher temperature in the seedling shoots. It can also be fully "baked" before sowing so that the temperature inside the sowing pot will increase. Build a windbreak, cover insulation coverings, improve windproof insulation performance. Always clean and wipe the plastic film so that it has a high degree of transparency. Watering seedlings, pouring small water, so as not to reduce the temperature. After the spring celery grows, most plants already have flower buds. The harvested stems are short and the longer the harvest, the longer the flower buds. Therefore, timely harvest should be made so as not to reduce the quality of celery when it is too long. Using the method of harvesting the loquat leaves can also prevent premature convulsions
(B) Gibberellin
Gibberellin has the effects of promoting vegetative growth, increasing yield, improving quality, and slowing down the seizures in the early stages of celery. The usual concentration is 20 to 50PPm. Gibberellin can not be mixed with alkaline pesticides, but can not be arbitrarily increased its concentration, otherwise celery will die or deformed growth. The application time should be sprayed once every 7 to 10 days during the growth period of celery, spray 2 to 3 times, and sprayed 15 days before harvest. Appropriate spraying can increase celery production by more than 20%, and its petiole grows and its texture is crisp and tender.
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