Celery has strong cold tolerance, especially in the seedling stage, which can withstand the short-term low temperature of -10 °C. With this feature, the seedling stage can pass through the winter in the shed, and after the spring, it will turn into normal growth with the increase of temperature.
l, suitable sowing: winter celery is suitable for planting in early August.
2. Soil preparation and fertilization: After the harvest of the former sorghum crops, clean up the dead branches and stalks, and apply 5,000 kilograms of high-quality farmyard manure that has been cooked to the surface, deep-turning the sputum, pouring the bottom water, waiting for planting.
3, sowing: the bottom of the bottom after soaking, the seeds should be spread evenly, after the sowing, the cover soil is 0.5 ~ 1.0 cm thick.
4, seedling management: After the emergence of celery is high temperature season, and the seedlings drought resistance is poor, should be timely added water, dip shallow irrigation, keep the soil moist. When the seedlings grow to 2 to 3 true leaves, the seedlings are taken and the weeds in the field are removed. When 4 to 5 leaves, the root system is more developed, and the absorption capacity is enhanced. The water can be properly controlled to keep the surface wet.
5, winter management: After entering mid-October, the temperature drops, you can first water once, then buckle the shed, the initial stage of the shed, should increase the ventilation, to prevent the temperature inside the shed too high, with the temperature drop, gradually reduce the ventilation, When the outside temperature reaches 6 °C, the shed around the shed is tightly pressed to stop the ventilation. Keep the white in the shed 18~20°C and 10°C at night. When the outside temperature drops to -5 °C, the shed is covered with a two-layer membrane to prevent the celery from being damaged by freezing. In case of short-term cold weather, the straw curtain around the shed is protected from freezing.
6. Management after wintering: After the spring, as the outside temperature rises, the temperature in the shed gradually rises. At this time, the two-layer membrane in the shed is removed, so that the plants are more likely to see sunlight, and the dust on the shed is often cleaned to improve the lighting conditions. When the local temperature is stable above 10 °C, the topdressing and watering should be started. The first water volume should not be too large to prevent the petiole from cracking due to excessive water absorption. Watering every 7 days or so will speed up plant growth and bring the morning market.
7. Harvesting: The later the harvest of winter celery, the higher the yield, but the harvest is too late, which affects the planting or production of Lianxiwen vegetables. Therefore, it should be harvested before the planting of fruits and vegetables, and the yield per mu can reach 3000. ~ 3,500 kg.
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