The drop of water on the solar greenhouse lighting surface is due to the poor quality of the drip-free membrane used. The water evaporated on the inner surface of the membrane does not flow down through the water film, but drops under the water droplets. The second is because the film on the membrane When the water flows downwards, it encounters obstacles such as iron wire and other construction materials to form drops of water.
The drip of water in the facility will increase the air humidity in the facility. Drops of water will drip on the leaves of the crop, and water film will form on the leaves. This will create the most favorable environmental conditions for the infection and development of pathogens and will quickly cause diseases.
To avoid the occurrence of dripping, first, use a thin film with good quality without dropping to cover it; secondly, change the greenhouse lighting surface of a vertical and diagonal type into a parabolic (arc) lighting surface, avoiding the use of a bamboo raft film. The shed film is in direct contact with the wire of the lighting surface, causing a large amount of dripping; the third is to set a 3 to 5 cm high section of wood or bamboo between the wire and the shed while installing the shed. Figure), so that the film is more than 8 cm above the wire, so that when the film is pressed by the film, the film will not contact the wire, and the water film will not be blocked. Moreover, after the treatment, the light-receiving surface film will be pressed into a wavy shape, and the wind resistance and pressure resistance will be enhanced, the lighting area will be increased, and the indoor light will be further improved, which is beneficial to the photosynthesis of the crop.
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