Vegetable greenhouse is a kind of glasshouse covered with glass. It is mainly divided into double-slope glasshouse and Venlo Glasshouse. The double-slope greenhouse has large operating space, convenient for mechanized operation, large daylighting area, even indoor lighting, large area and high utilization ratio of ground. The main structure adopts hot-dip galvanizing surface anti-corrosion, and the steel quantity per unit area is small. But double slope glass to heat preservation ratio is small, heat dissipation area is much, in winter because its heating load is big, so, operation cost is high. . Choose a place with convenient transportation, flat, open terrain, convenient drainage, rich reservoirs, rivers or groundwater, high and dry terrain, sheltered from the wind and the sun, with a groundwater level below 0.5 m, and deep and fertile soil. In addition, the direction of the shed is also important. Generally north-south or slightly southwest is better. That is, the north-south for the long greenhouses, the east-west for the wide greenhouses. East-west distance between the two sheds 0.8-2 meters, the middle has a width of more than 30 centimeters of small ditch. North-south two shed distance about 2-3 meters, for digging ditches, an water supply pipeline, the construction of access roads. Shed distance on the basis of normal production, the narrower the better, so that the higher the utilization of land. Whether to build a steel structure or a bamboo structure, it depends on their own conditions.

Vegetable greenhouse has good light transmittance, it can be used in areas with poor light in our country, it will not affect the photosynthesis and normal growth and development of crops because of light, but the heat preservation ratio of vegetable greenhouse is small, the glass thermal conductivity coefficient is big, therefore the energy-saving effect is bad, in winter, because its heating load is big in the cold area, therefore the running cost is high. Light is what allows plants to photosynthesize. Proper lighting is especially important for the production of greenhouses. The construction of proper shading system can not only ensure proper light, but also reduce indoor heat accumulation, reduce the temperature of greenhouse and protect the plants in greenhouse. So what is a shading system? The so-called shading system is the shading net installed in the indoor, and will enter the greenhouse to block the sun. In general, the shading system we choose is the shading net. Shading Net can not only ensure sunlight through, so that plants grow, but also through absorption to reduce some light, reduce the damage to plants. In general, the effect of shading in a greenhouse depends on the ability of the shading net to reflect sunlight. The sade net of different material, such effect often is quite different. As a result of the improvement of various technologies, the shading system is gradually upgraded. Both indoor shading system and outdoor shading system have different functions. Indoor shading system has many functions, such as shading, cooling, heat preservation, energy saving, anti-dew drop and so on. Users can choose according to their own needs.