The scientific cultivation of celery seedlings is now in winter. If the daytime temperature in Yangshuo is maintained at 15°C to 20°C, and the nighttime temperature is maintained at 8°C to 10°C, it can avoid passing through the vernalization stage. Preventive measures: 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, it is timely to harvest oysters.
The use of gibberellic acid gibberellin can promote vegetative growth, increase yield, improve quality, and reduce the effect of preconvulsions. The usual concentration is 20 to 50 ppm. 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.
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