Some points should be paid attention to in the selection of vegetable shed film

Release time:2023-12-27 Number of views: 84

Greenhouse planting vegetables in the light and temperature is very important, you need to choose a good shed film, what kinds of greenhouse film?

At present, the shed film sold on the market is roughly divided into four categories: no drop film, drop film, composite film and violet film.

Dripless film

Drip-free film (polyvinyl chloride film) covered after the inner surface of the shed film gathered water droplets can flow to the front corner of the shed, no water droplets on the film, good water permeability, the temperature in the shed is 4 -- 5 degrees Celsius higher than the drop film on average, conducive to the growth of winter shed vegetables and winter. There is no water drop under the film, and the humidity in the shed is small, which greatly reduces the occurrence of various diseases.

High temperature, good light and light disease in the shed are important conditions for the high yield of shed vegetables. No drop film aging resistance, generally available for more than 2 years. However, the non-drop film ratio is significant, the film thickness is 10-12 microns, and the 100-meter-long shed is about 125-130 kg, and the price is 20%-30% higher than the drop film. The film width is generally 3-4 meters, and it needs to be bonded when used. The use of this membrane is beneficial to spring fruit and vegetable production.

Dripping film

A drop film (polyethylene film) covering the inner surface of the rear shed film can gather a large number of water droplets, which seriously affects the light transmittance. The temperature in the shed is low, the light is weak, the water droplets will drop to the ground at any time, the humidity in the shed is large, the disease is heavy, which is not conducive to the growth of winter vegetables, and the yield of fruits and vegetables is low and the benefit is poor. There is a drop film width of 8-10 meters, covering without bonding. The specific gravity is small, the film thickness is 7-8 microns, and the 100-meter-long shed is only 70-80 kilograms, and the price is cheap. Suitable for low temperature and weak light resistance of leek, celery and other leafy vegetables and cold shed production.

Composite membrane

Composite film is a high-tech product at present. It is composed of three layers, and the front is a dust-proof film that does not absorb dust after treatment; Sandwiched between a high tensile resistance to aging strong film; Stick a drip-free film on the opposite side. In this way, it focuses on the three major advantages of dustproof, aging resistance and no drops. The specific gravity, thickness and price are close to the drip-free film, which is the ideal film for vegetable greenhouses in winter and spring. But it must be used with the front side up to get good results.

Violet film

Violet film can absorb and reflect violet light. Ziguang can control vegetable stems and leaves, cover ziguang film, reduce the ziguang in the shed, can promote leafy luxuriant, so to eat mainly vegetables such as leek, celery, cabbage, lettuce, rape, spinach, chrysanthemum chrysanthemum, coriander, green Onions, garlic seedlings, not only can improve the yield, but also improve quality, high yield effect.