1. Growth period management: After the completion of the planting, the slow seedling water should be poured in time, and it should be poured again every 2-3 days, and a new high-fat film should be sprayed to effectively prevent the ground water from evaporating and the seedling body water from evaporating to isolate diseases and pests , Shorten the slow seedling period, quickly adapt to the new environment, and grow healthily. After the celery seedlings are slowed down, watering should be controlled to squat seedlings, usually about 15 days, to promote rooting and heart leaf differentiation under the root system. Spraying vegetable strong stems at the right time can make the plant stems and stems thick, the leaves thick, the leaves fresh and tender, the plants lush, and the natural taste is strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual poisons.

2. Fertilizer and water management: Celery enters the growing period, its growth speeds up, and more fertilizer and water are needed. During this period, the soil must be kept moist and supply sufficient water and nutrients for celery. During this period, irrigation was used for irrigation, and nitrogen fertilizer was applied in combination with watering. When topping up urea, you can put urea in a bucket and add water to dissolve it. The combination of watering and fertilization can make the fertilization uniform, and it is beneficial to the faster effect of fertilizer. Root irrigation in combination with root fertilizer and micro-fertilizer in real time can induce plants to absorb, digest, and release N, P, K, and various trace elements in the soil, enhance the positive energy of celery development, and optimize the quality of celery.

3. Temperature and humidity management: The temperature and humidity of celery should be well controlled during the growing period. The most suitable growth temperature for celery in a greenhouse in winter is 15-20 ° C. When the temperature is too high, the growth of celery will stagnate or even die; Very large, celery is prone to spot disease, leaf spot disease and other diseases under the environment of high temperature and high humidity. Spraying a new high-fat film on the leaf surface can prevent moisture evaporation, sun protection, drought resistance, thermal insulation and freeze protection, soil layer compaction, suffocation and isolation of disease and insect sources.

4. Cold-proof and heat-preservation: The weather in the north of China is cold, with cold currents and cold air invading from time to time, and occasionally large-scale cooling may occur. Because the suitable growth temperature of celery is 15-20 ℃, and the temperature is below 15 ℃ for a long time, celery is not growing well. The main insulation measure for celery cultivation in a greenhouse is to cover the grass curtain. If there is no cold weather on sunny days, the grass curtain can be closed at 8 or 9 in the morning, which not only helps to increase the room temperature, but also increases the light and promotes the growth of celery. And sprayed with new high-fat film, which can prevent water evaporation, prevent bacterial infection, anti-freezing and heat preservation.

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