Main points of greenhouse vegetable cultivation techniques

First, fine land preparation. The cultivation of greenhouse vegetables requires intensive cultivation. Before planting, it is required to be flat, fine, straight, fat, and weed free. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright

Second, the variety selection. The selection of varieties is mainly based on early-maturing or late-maturing varieties, such as eggplant, tomato, green pepper, cucumber, spinach, celery, cabbage, cabbage, leeks, garlic, onions, kale, radish, Melons, broccoli, purple cabbage, peas, grass poison, etc. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright

Third, temperature control. The vegetables cultivated in greenhouses are mostly warm-type, the optimum temperature is 26-32 °C, the upper limit of survival temperature is 40-45 °C, and the lower limit is o-3 °C. When the temperature is higher than 32 °C, it is necessary to take measures to cool down, that is, open the shed door or ventilating hole, skylight and spray. When the temperature is lower than 5 °C, heating measures should be taken, such as heating by furnace fire, heating by hot air, heating by steam, etc. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright

Fourth, humidity control. The humidity in the greenhouse is too large, which directly affects the photosynthesis of vegetables and the absorption of mineral nutrients, and is conducive to the germination and infection of pathogenic cells. Therefore, ventilation should be carried out to promote the exchange of high-humidity air in the greenhouse with low-humidity air outside the shed, and reduce the relative humidity in the shed. Drip irrigation technology, mulching cultivation, and heating in the shed can also greatly reduce the air humidity. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright

Fifth, fertilizer and water management. The base fertilizer generally uses farmyard manure with long fertilizer efficiency, but it must be fertilized before application. The use of 4000-5000 kg per mu is mainly applied when deep-turning or soil preparation. When chemical fertilizer is used as the base fertilizer, the application amount per mu is 40-50 kg of superphosphate, and 15-20 kg of diamine or compound fertilizer. It can be applied by ditch, and the superphosphate is preferably mixed with organic fertilizer. The amount of topdressing usually accounts for about 1/3 of the total fertilizer requirement during the whole growth period of the crop. In the early stage, the nitrogen fertilizer was the main factor, and the later stage was mainly the phosphorus and potassium fertilizer. The application methods were rushing, spreading, burying, and topdressing. Vegetable cultivation in greenhouses is not only afraid of cockroaches but also lack of water. In addition to drip irrigation and fog irrigation, it is mainly artificial watering. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright

Sixth, pest control. Artificial control is mainly to remove pests and diseases and diseased plants, and physical control includes selection of disease-resistant varieties, rational rotation, deep-deep deep cultivation and so on. Drug control should be selected according to actual needs. In practice, it is necessary to recognize the control on the label, the object of prevention and treatment, the dosage of the drug and the method of use, so as to achieve the right medicine. Linyi Fertilizer Network Copyright

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