The correct covering method of greenhouse film

With the production of high molecular polymers-polyvinyl chloride and polyethylene, plastic films are widely used in agriculture. So, what is the correct covering method of greenhouse film?

1. Preparation for film mulching

1. Personnel preparation

Take the 100-meter-long east-west shed with a span of 9.5 meters as an example, requiring at least 20 people to participate.

two。 Thin film preparation

Vegetable greenhouse film is divided into two pieces, one is roof greenhouse film, the other is ventilation greenhouse film. The former suggests to buy films such as EVA or PO with high light transmittance, strong anti-fog and long life, with a length of 98m and a width of 10.5m, and the upper end of the greenhouse film should wear a "pull rope" in advance. The latter is appropriate to choose and buy the usual greenhouse film, the length is the same as the former, the width is about 3 meters, the same should be prepared for pulling rope.

3. Preparation of things

Pliers, tensioner, bamboo pole, iron wire, steel wire, pressure film rope and so on.

Second, cover up the greenhouse film

Covering up the greenhouse film should be carried out on a sunny and windless afternoon. Covering up the roof greenhouse film can be divided into four major processes:

The first step: pull the film on the shed. Such as: from the east of the greenhouse, need 20 people, every 5 meters, lift the greenhouse film in turn, along the front of the greenhouse, lift one end of the greenhouse to the west of the greenhouse. Then, another 10 people pulled up the side of the shed film (with a rope), went up from the bottom of the shed, walked up the arch, pulled the film up to the surface of the shed, and the remaining 10 held the film in place to help the other 10 pull the film.

Step 2: fix the upper end of the membrane. Methods: one person first fixed the steel wire on the pulling rope on the east side of the greenhouse, and the other person pulled the pulling rope on the west side of the greenhouse, so that the steel wire could pass through the greenhouse film. Later, this end of the steel wire was fixed on the ground anchor on the west wall of the shed, and the other end of the steel wire was fixed with a tightening machine. Finally, the upper end of the shed film is tied to the bamboo pole with iron wire, and every other bamboo pole is bound once. Pay attention to the binding of the wire head down, so as to avoid piercing the shed film.

Step 3: fix both ends of the membrane. First wrap the 10-meter-long bamboo pole with the edge of the shed film, and then 10 people pick up the bamboo pole and pull it down. after pulling it tightly, it can be fixed on the ground with iron wire, about 50 centimeters in one place. In order to enhance the robustness, it is recommended that the iron wire should be surrounded by S-shaped steel wire. According to the same method, the film end on the east side of the shed is fixed.

Step 4: bury the front end of the film. At the front of the greenhouse, 5 people are needed to roll up the front end of the greenhouse film with a bamboo pole, pull down and tighten the greenhouse film, and the other 5 people bury the greenhouse film with soil and step on it.

Third, press the film rope

According to the method of covering up the roof shed film, after covering up the ventilation shed film, it is necessary to press the film rope to strengthen the robustness of the greenhouse film. The upper end of the pressure film rope is tied to the ground anchor at the top of the shed, and the lower end is tied to the ground anchor at the front of the shed, which can be pressed every 2 meters. The key point is to tighten and fasten.

Finally, the editor would like to remind everyone to choose the place where the shed is sunny, sheltered from the wind, highly dry, well drained and free of soil infectious diseases.