Find out the bottom of the family: To understand the status of soil fertilizers in spring facilities and the need for old production areas, organic fertilizers must be the main source, and it is best to use high-quality organic bacterial fertilizers. In the old facility producing areas that do not use commercial organic bacterial fertilizer, organic fertilizers of farmhouse type can be applied in the spring, but they must be applied after the previous year is fully rotten to prevent burning. Chemical fertilizer application recommendations: take soil testing formulas, but also be tested frequently, and apply different fertilizers according to different crops. Due to the application of chemical fertilizers throughout the year in the old facilities, soil acidification or alkalization may be caused. The weak acidity of the soil is the favorite environment for plant roots. Therefore, the use of fertilizers must be selected according to the pH of the soil. The soil is selected from alkaline fertilizers, and alkaline soils are used from acidic fertilizers. Newly-built facilities are mostly "growing vegetables", the content of soil organic matter is insufficient, and the content of a large number of elements is low in nitrogen, phosphorus, and potassium, and vegetable farmers apply excessive amounts of fertilizer to obtain high yields as soon as possible, which will cause excessive mineral elements and secondary soil salinization. Soil barrier. Therefore, for new production facilities, soil fertilization should be the main area. The basis of soil fertility in vegetable fields is the content of soil organic matter. For new production facilities, increasing the content of soil organic matter has become the focus of soil fertility. The main measures are to increase the application of high-quality organic fertilizer, thoroughly decomposed farmhouse fertilizer, and return straw to the field. Measures. Fertilizer selection: comprehensive consideration of crop and soil health, planting benefits. For crops, the base fertilizer of soil-grown vegetables is similar. Eggplant fruit vegetables: Generally organic fertilizer + compound fertilizer + trace element fertilizers such as calcium, magnesium, iron, coriander, zinc, etc. There is a large difference in various types of vegetables for topdressing, but potassium, phosphate and trace element fertilizers are also mainly used. It is mainly adjusted according to the plant, fruit growth, and soil conditions. Leafy vegetables: a large amount of elemental fertilizers are mainly nitrogen fertilizers, and micro-fertilizers are mainly calcium, magnesium, etc. If the soil is more acidic, nitrate nitrogen fertilizer can be selected, and soil alkaline should be applied with ammonium nitrogen fertilizer. At present, the soil in the facility is severely damaged. In order to gradually restore soil health, it is really reasonable to reduce the application of chemical fertilizers and choose more organic fertilizers. In addition, vegetables with higher added value can choose better quality organic bacterial fertilizer and cooperate with appropriate amount of fertilizer. Ordinary vegetables can be applied with fully decomposed farm manure and suitable quantitative fertilizer. Technical coordination: Apply organic fertilizer, compound fertilizer, and trace element fertilizer evenly on the surface of the soil before water, fertilizer, light, ventilation, and temperature planting. Rotary tillage is 30 cm. Generally, rotary tillering is performed 2 to 3 times, so that the soil can be planted. But to get higher yield and better quality, fertilizer alone is not enough. In facility agricultural production, the factor that restricts yield and quality is the environment: in early spring, North China has plenty of light, and the daytime temperature in the greenhouse can reach 30 ° C. This requires openings to reduce the temperature in the greenhouse. How big is a purely technical issue. The solution is to open a gap of about 2 cm for the top air vent two hours after sunrise and open it for about 10 minutes. This process has two functions of dehumidifying and putting in carbon dioxide. When the temperature in the greenhouse rises to 30 ° C, the air vent can be opened about 3 cm to gradually cool down. In the warm room, a windshield film should also be set under the top air vent to prevent cold wind from directly blowing on the crops. Controlling the environment in the greenhouse will lay the foundation for future high yields. Disclaimer: Some articles on this website are transferred from the Internet. 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After busy listing vegetables for the Spring Festival, farmers engaged in facility agriculture will be busy fertilizing again in the spring. Fertilization in spring is not only the most important factor in the overall planning of fertilizers for facility agriculture throughout the year, but also an important barrier to investing in good soil health in facilities. This issue focuses on various problems that farmers have encountered in the investment and management of spring fruits and vegetables in facilities in recent years. It is briefly summarized and arranged for reference only.