1. Temperature management. Removing the apron membrane from the greenhouse and changing it into a rain canopy is not only beneficial to ventilation and cooling, but also avoids the prevalence of diseases when it rains. When the temperature is high and the sunlight is strong, the shade net is covered outside the greenhouse until the harvesting is completed.
2. Fertilizer management. Cultivation of celery in the summer is a time when water and fertilizer are attacked. It is not possible to plant seedlings, otherwise it is easy to suffer from drought and lack of fertilizer, affecting yield and reducing quality. Watering is generally 3 to 5 days, so that the soil in the shed is always kept moist to promote the vigorous growth of celery and reduce the ground temperature; top dressing should grasp the principle of a small number of times, usually every 10 to 15 days, each time per acre Application of urea or compound fertilizer 10 to 15 kg.
3. Hormonal treatment. In summer, the temperature is high, and the temperature can be reduced by 3°C～5°C after covering with shade nets. However, sometimes the temperature is still high, about 20 days before harvest, spraying 50 mg/kg gibberellin twice can promote the growth of celery. Prevent plant aging and improve the quality of celery.
4. Pest control. In summer, the occurrence of celery worms, virus disease and spot blight is serious, and timely prevention and treatment should be paid attention to. Virus disease can be controlled by virus A and phytosanitary spirit spray. Spot blight can be controlled by antivirus methide and metalaxyl manganese zinc spray.
5. Harvest. According to the growth of celery and market demand in time harvest, can be divided into 2 to 3 times between the large plants listed, leaving small plants continue to grow.
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