Zhang Changqing from Zhongxing Town, Puyang County, said on May 8 that the local farmers who planted and planted Tianjin Solid Celery in late December last year have been convulsing early after May 2 this year. This variety has been grown locally for many years and has not been seen before. He asked whether the celery twitching in advance was related to the special climate this year. The person in charge of the Tianjin Kerun Vegetable Research Institute said in an interview with reporters that the phenomenon of convulsive celery in the early winter celery and spring sowing celery often occur. Celery is a low-temperature long-day plant. When plants have 3-4 leaves, they encounter low temperatures below 10°C, and they can pass the vernalization stage within 10-15 days. Plants that are vernalized are easily convulsed early in the spring at higher temperatures and long day conditions. From January to March this year, the temperatures in northern Jiangsu were relatively low, and there was a persistent low temperature. It was difficult to maintain a high temperature in greenhouses, which created conditions for the adoption of vernalization of celery, which directly led to the convulsions of celery in advance. Spring sowing cultivation celery should be sown at the end of January to the beginning of March. Greenhouse seedlings should be covered with roast quail in advance, and sown when 10 centimeters of soil temperature reaches 10°C or more. Varieties should be selected for winter celery varieties, should not choose the celery. In the nursery stage, the temperature of the seedbed should be improved. Generally, it is maintained at 15-20°C during the day and 10°C or more at night. Celery does not easily pass vernalization under such temperature conditions. The seedlings cannot be grown during the growth period, and the fertilizer should be vigorously promoted. Water should be added as much as possible to keep the ground moist, and nitrogen fertilizers are often topdressed. Adequate water and fertilizer can promote vegetative growth of plants, inhibit reproductive growth, and slow down pre-convulsions. Celery twitches in advance of harvest time and should be harvested early to ensure its commercial quality.
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