Ensure proper temperature and good light
In the spring, celery reaches the vegetative stage. During this period, the temperature is controlled at 15°C~20°C during the day and 8°C~16°C at night. Pay attention to ventilation at the beginning and pay attention to insulation in the later period. In spring, the temperature has picked up, and it is necessary to provide large ventilation during the day and night so that the night temperature is not higher than 18°C. The shed film is wiped in about 10 days to maintain the transparency of the shed film. The yellow leaves of the lower part of the plant were removed in time to improve the light transmission conditions between the plants.
Fertilizer supply is sufficient
Immediately after the seedlings are finished, they begin to water, and follow the application of urea and potassium sulfate 8 to 10 kilograms per acre with water. After that, topdressing once every 20 to 25 days. Shelf room celery should control the amount of watering and the number of times, watering should be carried out in the sunny days from 10 to 11 o'clock in the morning, and strengthen the ventilation and cooling to prevent excessive temperature and disease. Stop topdressing for 20 days before harvest and stop watering for the first 10 days to reduce the sulfate content in the plant and facilitate harvesting, storage, and transportation.
Timely control of pests and diseases
The vigorous growth of celery nutrition is also susceptible to bacterial diseases such as spot blight, leaf spot and other fungal diseases and soft rot. In addition to the prevention and control of disease and humidity, reducing the temperature difference between day and night, reducing condensation, avoid flooding irrigation and other ecological preventive measures, but also timely inspection, found that the disease early implementation of chemical control, leaf spot disease, leaf spot disease For fungal diseases, 45% of chlorothalonil smoke agent seedlings can be used for 200-250 grams, and they can be ignited in darkness overnight in a closed greenhouse; or 5% of chlorothalonil dust and 1 kg or 64% of antivirus WP can be sprayed in acres. 75% chlorothalonil WP 500 times; 50% carbendazim WP 800 times.
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