How to grow vegetables in greenhouses?

Greenhouse vegetable planting technology is a common technology, which has good thermal insulation performance and is deeply loved by people, because out-of-season vegetables can be eaten at any time. Here's how to grow vegetables in a greenhouse:

1. Land Leveling and Balanced Fertilization Greenhouse vegetable cultivation requires high soil quality and fertilizer management, which needs to be carried out from a scientific perspective. The land where vegetables are planted should be flat, delicate and stone-free. After planting the flat land, it should be renovated, fertilized and weeded. Due to the temperature difference between greenhouse and outdoor, it is necessary to apply appropriate amount of fertilizer to avoid soil degradation caused by excessive fertilization. Appropriately increase the application of phosphate fertilizer and potash fertilizer and reduce the use of nitrogen fertilizer.

2. Choose a reasonable shed structure. Generally speaking, the span of shed is 8~ 12m, and the length of shed is 60~ 120m. It is best to use bamboo or steel for three walls and three rows of columns. Use non-drop coating on the surface of scaffold to improve the internal temperature of scaffold.

3. Variety selection The best choice can be varieties with low temperature tolerance, low light requirement, strong stress resistance, high humidity tolerance, high yield and short planting time. In order to meet the market demand and improve economic benefits, high-yield and high-quality greenhouse vegetables can be planted. For example, grow cucumbers, tomatoes and green peppers.

4. Reasonable use of "greenhouse gases" to control temperature and humidity. In the process of planting vegetables in greenhouse, because the greenhouse is closed, it is easy to produce some harmful substances, which will damage the growth rate of vegetables. Therefore, greenhouse gases should be controlled correctly and utilized reasonably. Greenhouse vegetables lack carbon dioxide in the morning, so it is necessary to supplement carbon dioxide gas fertilizer appropriately to promote vegetable growth. When the temperature is high at noon, properly open the tuyere for ventilation to avoid the harm of harmful gases to vegetables. Vegetables in greenhouse are mainly warm-loving vegetables, the optimum temperature is 25℃~33℃, the highest survival temperature cannot exceed 44℃, and the lowest survival temperature cannot be lower than 0. When the temperature exceeds 33℃, the temperature should be lowered, and the shed can be opened regularly for ventilation, ventilation and spraying. When the temperature is lower than 0℃, heat, such as hot air heating. Control the humidity in the shed to avoid excessive humidity affecting the growth of vegetables. Therefore, frequent ventilation is needed to improve the humidity in the greenhouse. ?