Humidity in the shelter should change

There are many kinds of cucumbers in Yangying Village, Datian Town, Shouguang City. Master Yang also planted cucumbers in both sheds this year. But as the temperature gradually decreases, he finds that the same management, his cucumber is easier than others' sheds. In case of downy mildew, other people's cucumber mildew is developed from the front face to the north, and Master Yang's almost full shed appears at the same time.
The main condition for the occurrence of cucumber downy mildew is high humidity. The cucumber mildew mildew of Master Yang shows that the humidity in the shed is relatively high. What is the cause of this? Master Yang went back and forth to the shed of others for several times and finally discovered the problem. The original cause of the high humidity in Master Yang's greenhouse was due to the different types of mucous membranes.
According to Master Yang, his mucous membranes used this year was "knife sticky" (commonly known), while others' films were glued with rollers. At present, it is more popular to use a roller to stick. In this way, the mucous membrane speed is fast and the film can be saved. However, if the film is not clean at the time of stacking, it will not stick well, and the film will easily pull from the sticky mouth when the film is on. open. Knife sticking is a relatively old way of mucous membranes, which is relatively firmer than rollers. However, in the case of mucous membranes, it is necessary to fold the two membranes in half, and the adhesion part is only 5 mm. The remaining film, and this part of the remaining film is the main cause of humidity within the Yang Master shed, because of the impact of this part of the film, the water droplets on the film are blocked when they flow down, they gather here to form dripping, so this The humidity will increase.
In general, a greenhouse needs five membranes, which forms four barriers, resulting in high humidity in the entire greenhouse. The use of a smooth roller interface, the water is generally only dropped to the front face, so only the front face humidity is high.
Therefore, the reporter suggested that Master Yang, after the film is best to use roller sticky, to avoid the interface problem caused by dripping water.

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