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Some precautions for changing vegetable greenhouse film

2020-08-24

1. Do not pay attention to the maintenance of the film before changing the vegetable greenhouse.

The greenhouse mulching film supports the bamboo poles to bear the heavy pressure of straw mulching. When it encounters heavy snow, its bearing capacity will greatly increase, causing some bamboo poles to be crushed or broken. These bamboo poles need to be repaired or replaced in time.

The broken bamboo pole can be removed and replaced, or another one can be added beside the broken bamboo pole. The original damaged part is wrapped with cloth to prevent piercing the film. You can wrap the cracks with bamboo.

2. The east-west steel wire is directly pressed on the gable wall.

When installing east-west membrane pressing steel wires in the greenhouse, some vegetable farmers directly press the steel wires on the gable wall. When tightening the steel wire with a wire tightening machine, the steel wire will be pulled into the gable wall, which is not conducive to fastening.

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 area of ​​the steel wire and prevent the steel wire from being trapped in the gable wall.

3. Press the film rope directly on the plastic film of the greenhouse.

When pressing the vegetable greenhouse film in the north-south direction, if the laminating rope is directly pressed on the greenhouse surface, when the straw is pulled or the wind is blowing, the laminating rope will swing, and the film at the turning point between the greenhouse surface and the greenhouse will swing. Prolonged fatigue.

It is recommended to put rags, rubber tubes, PVC pipes on the turning points between the shed and the front of the shed, or set up plastic hoses on the laminating rope to avoid direct contact between the laminating rope and the greenhouse film, and to reduce the gap between the laminating rope and the greenhouse film. Friction slows down the wear rate of the film.

4. The old film should be taken out too early.

When some vegetable farmers change the film, they usually remove the old film first, and then replace the new film after maintenance or replacement of the steel wire and bamboo pole on the shed. During this period of time, the temperature and humidity in the greenhouse have undergone major changes, and some pests from the outside have also taken 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 new membrane.

It is recommended that vegetable farmers cooperate and help each other to change vegetable greenhouse films. The bamboo poles that need to be replaced can be prepared in advance, the new film should be placed in front of the shed, the old film should be removed, and the bamboo poles that need to be replaced should be replaced in time to cover the new film to shorten the film replacement time.


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