Planting technology of greenhouse

Planting in greenhouse is a common technique for cultivating vegetables and fruits. In general, vegetables and fruits in the greenhouse are made of bamboo and steel, and then covered with one or more layers of thermal insulation plastic film, so a simple structure creates a complete greenhouse space. Plastic film can effectively prevent the loss of carbon dioxide produced during the growth of vegetables or fruits, so as to achieve the heat preservation effect needed in the greenhouse.

High-yield planting techniques of vegetables in greenhouse

1. Flat land fertilization

Greenhouse vegetable cultivation requirements are relatively high, no matter the degree of soil quality, or fertilization management have high requirements, we need to proceed from a scientific point of view. Choose to plant vegetable land to be flat and fine, and the land should be renovated, fertilized and weeded before planting. As the temperature in the greenhouse is different from that of the outside world, appropriate amount of fertilizer should be applied to avoid soil deterioration caused by excessive fertilization. Appropriately increase the application of phosphorus and potassium fertilizer and reduce the use of nitrogen fertilizer.

two。 Shed structure

In general, the span of the shed is 8cm 12m, the length of the greenhouse is 60m 120m, three earth walls and three rows of columns, it is best to use bamboo or steel frame on the columns. A drip-free film is used on the surface of the greenhouse to increase the temperature in the greenhouse.

3. Variety selection

The best varieties can be resistant to low temperature, low light requirements, strong resistance, high humidity tolerance, high yield and short planting time. The high yield and good quality of vegetables planted in the greenhouse can meet the market demand and improve the economic benefit. Such as growing cucumbers, tomatoes, green peppers and so on.

4. Temperature and humidity control

In the process of planting vegetables in the greenhouse, because the greenhouse is airtight, it is easy to produce some harmful substances. Therefore, it is necessary to correctly control greenhouse gas and make rational use of greenhouse gas. In the morning, CO gas fertilizer should be properly supplemented to promote the growth of vegetables. In the lunchtime, when the temperature is high, properly open the vents and breathe, so as to avoid harmful gases harming vegetables.

The vegetables planted in the greenhouse are mainly temperature-loving type, and the optimum temperature is 25 ℃ ~ 33 ℃. The highest temperature can not exceed 44 °and the lowest can not be below 0 °.

5. Drip irrigation under plastic film

The evaporation and diffusion of water in the greenhouse is relatively slow. Drip irrigation under plastic film can not only greatly improve the environment in the greenhouse, but also control the humidity in the normal range, maintain the temperature in the greenhouse, reduce the incidence of diseases, and increase the yield of vegetables.

6. Pest control

As vegetables are easy to produce pests in the process of growth, the main control method is to get rid of pests. Common pests are land tigers, aphids and so on. In general, the choice of copper, zinc agents, this kind of medicine, not only can super sterilization, but also can increase the resistance of vegetables, effectively promote the growth of crops, maintain a good ecological environment, reduce humidity.

Soil-borne bacteria are serious germs. If there is no good control in the early stage, the growing vegetables will be contaminated by germs. Therefore, attention should be paid to seedling prevention and physical control, such as deep ploughing, variety selection and so on. When there are different degrees of disease, it is necessary to treat the disease and give medicine scientifically.

As the greenhouse is not open-air, so the control of temperature and humidity is the most important. In addition, the use of scientific management can make vegetables grow better.