Cultivation and management techniques of celery overwintering in greenhouse

1. Growth period management: after the completion of planting, water slowly and once again every 2-3 days, and spray a new high-lipid film, which can effectively prevent the ground water from evaporating and the seedling water from transpiration, which can isolate pests and diseases. , Shorten the slow seedling period, quickly adapt to the new environment, and grow healthily. After the celery seedlings are slowed down, control the watering to squat the seedlings, generally squatting the seedlings for about 15 days to promote the differentiation of the roots and the heart leaves. Spraying vegetable Zhuangcailing at the right time can make the plant stalk thick, thick leaves, fresh and tender leaves, lush plants, and strong natural taste. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce the residual toxicity.

2. Fertilizer and water management: Celery enters the growth period, growth is accelerated, and more fertilizer and water are required. During this period, the soil should be kept moist and sufficient water and nutrients should be supplied to celery. During this period, the irrigation method was used for watering, combined with watering and topdressing nitrogen fertilizer. When topdressing urea, put the urea in a bucket and add water to dissolve it, and irrigate it with water to the field. The combination of watering and fertilization can make the fertilization evenly, and is conducive to the faster display of fertilizer efficiency. Real-time irrigating with roots and micro-fertilizers can induce plants to absorb, digest, and release nitrogen, phosphorus, potassium and the most trace elements in the soil, improve the positive energy of celery development and optimize the quality of celery.

3. Temperature and humidity management: The temperature and humidity should be controlled during the growth period of celery. The most suitable growth temperature for celery in the greenhouse in winter is 15-20℃. When the temperature is too high, the growth of celery will stagnate or even die; if the humidity is also at the same time It is very large. Celery is prone to diseases such as spot disease and leaf spot under high temperature and humidity. Spraying the new high-fat film on the leaf surface can protect moisture, water resistance, evaporation, sun protection and drought resistance, heat preservation and freeze protection, soil layer hardening, suffocation and isolation of pest sources.

4. Cold protection and heat preservation: The weather in northern my country is cold, with cold currents and cold air from time to time, and occasionally a large drop in temperature occurs. Because the suitable growth temperature for celery is 15-20℃, and the temperature is lower than 15℃ for a long time, celery does not grow well. The main insulation measure for celery cultivation in greenhouses is to cover straw curtains. If there is no cold current on a sunny day, the straw curtain can be put away at 8 or 9 o'clock in the morning. This will not only help increase the room temperature, but also increase the light and promote the growth of celery. And spray the new high-fat film, which can prevent evaporation of water, bacteria infection, antifreeze and heat preservation.

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