The installation cost of glass greenhouse is generally around 55 yuan/square meter, and the transportation cost is in 5 yuan/square meter according to the distance. The profit of enterprise management fee is generally about 10%, that is, 30~40 yuan/square meter. At present, the profit rate of greenhouse industry is not high, and there are certain safety risks because of the large amount of greenhouse installation labor and long-term aerial work.
Extended data:
Greenhouse covering materials are as follows:
1, ordinary membrane: made of polyethylene or polyvinyl chloride, with a thickness of 0. 1 mm, colorless and transparent. The service life is about half a year.
2. Multifunctional long-life film: It is made by adding proper amount of anti-aging materials and surfactants in the process of polyethylene blow molding. Its service life is twice as long as that of ordinary film, and the greenhouse temperature at night is1-2℃ higher than other materials. Moreover, the film is not easy to form water droplets and has a good covering effect.
3, grass quilt, grass cover: woven from straw, good thermal insulation performance, is a night thermal insulation material.
4. Polyethylene high foaming film: it is a white plastic film with many bubbles, with a width of 1 m and a thickness of 0.4-0.5 cm. It is light and can be rolled up, and its thermal insulation is similar to that of grass quilt.
5. Non-woven fabric: a kind of polyester filament, which is not woven and spun. There are two kinds of black and white, and they have different densities and thicknesses. The common specification is 50g/? Besides heat preservation, it is often used as a sunshade net.
6. Sun screen: a plastic woven screen. Commonly used are black and silver gray, and there are several density specifications, and the shading rate is different. It is mainly used for sunshade and rainproof in summer, and can also be used for thermal insulation and covering in winter.
Baidu encyclopedia-greenhouse