During the use of the plastic greenhouse film, due to pollution, adhesion of water droplets and other reasons, its light transmission capability will be greatly reduced. Farmers should take various measures to increase the transmittance of the greenhouse film.
First, clean the film
To increase the light transmittance of the plastic film in the booth, besides designing the lighting angle and promoting the use of non-drip film, the management should clean the surface of the film with clean water every 5 to 7 days to clean the dust and smash the grass. Can increase the transmittance of 5% to 8%.
Second, dry fine soil or gypsum powder
Flatten the new agricultural film and spread fine soil or gypsum powder on it (if not, use local loam, but it must be sieved). Wipe it with a towel or cloth several times to wipe it clean. When the film is covered, the treated side faces inward, which reduces the adhesion of water droplets.
Third, spray soy flour
Soybean ground into fine powder, per square meter of film with soybean powder 7.5 ~ 10 grams, 150 grams of water, soak 2 hours after the use of fine gauze filter, remove the residue and spray with a sprayer on the film on the spray, can The drops of water drop quickly and keep fresh water droplets for 15 to 20 days.
Fourth, turn drying film
Where there is no condition for the use of a non-drip film, a tanning film should be used to reduce the adhered water droplets. It has been proved by practice that the sun-turned film can be comparable to a drop-free film. The specific approach is: in the 15 to 20 days before the frost, the sheds are buckled. After about 30 days, the windless, sunny noon is selected. The membrane is removed and turned over, so that the original upward side turns downwards and then is fixed. This greatly reduces the water droplets and greatly increases the light transmittance.
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