What are the covering materials for growing vegetable greenhouse?

Vegetable greenhouse planting technology is a relatively common technology, it has a good thermal insulation performance, it is deeply loved by people, because out-of-season vegetables can be eaten at any time. In general, greenhouse vegetables use bamboo and steel-based structural skeleton, and then covered with one or more layers of thermal insulation plastic film, such a simple structure to create a complete greenhouse space. Plastic film can effectively prevent the loss of carbon dioxide produced in the process of vegetable growth, so as to achieve the heat preservation effect needed in the greenhouse. In production, farmers should choose suitable vegetable greenhouse covering materials according to their own production needs.

1, ordinary membrane. With polyethylene or PVC as raw material, the film is 0.1 mm thick, colorless and transparent, and the service life is about half a year.

2, multi-functional longevity membrane. It is made by adding an appropriate amount of anti-aging material and surfactant in the process of polyethylene blow molding. The width is 7.5m and the thickness is 0.06mm. The service life of the film is twice as long as that of the ordinary film, and the greenhouse temperature at night is 1-2 ℃ higher than that of other materials. The film is not easy to form water droplets, good covering effect, low cost and high benefit.

3, grass quilt, grass fan. Woven with straw, good thermal insulation performance, is a night thermal insulation material.

4, polyethylene high foaming film. The white bubbly plastic film, 1 meter wide and 0.4-0.5 cm thick, is light and can be rolled up, and its thermal insulation is similar to that of grass quilts.

5, non-woven fabric. A polyester filament, unwoven cloth. It is divided into black and white, and has different density and thickness. it can also be used as a sunshade net in addition to heat preservation.

6, sunshade net. The utility model relates to a plastic wire mesh, which is commonly used in black and silver gray, and has several density specifications, each with different shading rates. It is mainly used for sunshade and rain protection in summer, and can also be used as thermal insulation cover in winter.

7, glass. There are mainly three kinds of flat glass, toughened glass and plexiglass. Flat glass is the main light guide covering material for permanent steel structure greenhouse, which has good optical efficiency and mechanical properties, but its tensile strength is poor and fragile, and the tensile strength of toughened glass is greatly improved. however, it is not resistant to high temperature and has the phenomenon of self-explosion in hot summer, so it is suitable for roof ridge greenhouse.

The above are all kinds of vegetable greenhouse covering materials, a total of farmers reference!