Multi Span Film Greenhouse With NFT System For Leafy Greens

Multi Span Film Greenhouse With NFT System For Leafy Greens，there are white film and blue film, most greenhouse choose white color film.

Reasons for choosing white plastic film for greenhouses:

1. White film has better light transmission.Greenhouses plastic film with white, can as much as the sun into the greenhouses.Absorbs heat and saves energy.

Vegetable greenhouses are generally used in light blue and white two kinds of film, light blue film itself light absorption, to quickly improve the temperature in the shed has a certain help, but the light blue film has an impact on the transmittance of light, to promote photosynthesis of blue light has a certain filtering effect, affecting the color of solanaceous vegetables.The white film has a filtering effect on the penetration of red and orange light.

2. The problem of ultraviolet intensity.With the increase of latitude and altitude, the intensity of ultraviolet light will become more and more intense, light blue film itself is easy to absorb aging, its service life will be greatly reduced.That is, at altitudes of more than 1, 000 meters above 38 degrees north latitude, pale blue membranes are generally not suitable for white membranes.

Multi span film greenhouse always to with NFT system for grow vegetables, such as lettuce. 

greenhouse with ventilation sytem and sunshading system and cooling system offen, can design according to your local temperature.

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