Greenhouses are used to grow vegetables. The cover of the greenhouse is generally covered with glass, film and other materials. The cost of glass is relatively high. Many farmers choose to use film. However, after the film is used for several years, the light transmittance is not so good. , It will also age, so the film should be replaced, so what should I pay attention to when changing? Next, Qingzhou Luhong Plastic Co., Ltd. will introduce the misunderstandings that should be paid attention to when changing vegetable greenhouse film:
Misunderstanding 1: Do not pay attention to the maintenance of bamboo poles before changing the film. The bamboo poles in the greenhouse have to withstand the heavy pressure of straw covering. When encountering heavy snow, the bearing capacity will greatly increase, causing some bamboo poles to be crushed or broken. These bamboo poles should be repaired or replaced in time. The other bamboo pole is connected to the broken bamboo pole. The original damaged part is wrapped with cloth to avoid piercing the film.
Misunderstanding 2: The east and west steel wires are directly pressed on the gable wall. Some vegetable farmers directly press the steel wire on the gable wall when installing the steel wire for the greenhouse and vegetable greenhouse film. When tensioning the steel wire with a tensioner, pull the steel wire into the gable wall. It is recommended that the bottom of the steel wire on the gable wall be stuffed with waste tires or shoe soles to expand the force-bearing area of the steel wire to prevent the steel wire from being trapped in the gable wall.
Misunderstanding 3: The film pressing rope is directly pressed on the film. When using a rope to press the film in front of the shed, if the film is pressed in front of the shed with a rope, the film will be pressed in front of the shed by the wind rope. It is recommended that vegetable growers put rags and hoses on the surface of the shed or at the turning point in front of the shed, or put a plastic hose on the laminating rope to slow down the wear of the greenhouse film.
Misunderstanding 4: Remove the old film too early. When some vegetable farmers change the vegetable greenhouse film, they usually remove the old film first, and then replace the new film after the steel wire and bamboo poles are maintained or replaced. During this period, the temperature and humidity in the greenhouse changed, and some pests from the outside also took the opportunity to fly into the greenhouse, laying hidden dangers for the occurrence and spread of some pests. Therefore, it is necessary to shorten the time from the removal of the old membrane to the replacement of the membrane.