Film greenhouses fully utilize solar energy, provide certain insulation, and can adjust the temperature and humidity inside the greenhouse to some extent through rolling the film. Therefore, in northern regions of our country, film greenhouses primarily serve as heat-preserving cultivation for early spring and late autumn, generally allowing for a 30-35-day advance in spring and a 20-25-day extension in autumn, but not suitable for overwintering cultivation. In southern regions, besides using film greenhouses for heat preservation and overwintering cultivation of vegetables and flowers during winter and spring, they can also be fitted with shading nets for shading, cooling, and protection against rain, wind, and hail during summer and autumn, facilitating facility cultivation.

Our vast territory and complex climate make the use of film greenhouses for the cultivation of vegetables and flowers, etc., play a particularly significant role in alleviating the supply and demand contradictions during the off-season for vegetables. This approach offers substantial social benefits and significant economic returns.