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 is over-winter in the shed, and after the spring, it will turn into normal growth with increasing temperature.
Fertilizer management celery enters the growing season, the growth is accelerated, and the required fertilizer and water are also more. In this period, the soil should be kept moist, and the celery should be supplied with sufficient water and nutrients. In this period, watering is carried out by irrigation, and nitrogen fertilizer is applied in combination with watering. When urea is applied, the urea can be dissolved in a bucket and dissolved in water, and poured into the field with water. The combination of watering and fertilization can make the fertilization uniform and facilitate the quick effect of fertilizer efficiency.
Cold-proof insulation Because the suitable growth temperature of celery is 15 °C ~ 20 °C, the temperature is lower than 15 °C for a long time, the growth of celery is poor, and the main insulation measure for celery cultivation in greenhouse is to cover the straw curtain. If there is no cold weather on sunny days, the straw curtains can be put away at 8 or 9 in the morning, which not only helps to raise the room temperature, but also increases the light and promotes the growth of celery. And spray a new high-fat film, water-proof evaporation, anti-bacterial infection, anti-freeze insulation.
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