According to the cultivation of vegetables and their own conditions, the correct selection of shed film is an important part of the production of scaffolding Lai. Currently marketed on the market are generally divided into four types of film: no drip film, drip film, composite film and purple film.
After the dripless film (polychlorinated film) is covered, the water droplets collected on the inner surface of the shed film can flow along the slope to the front corner of the shed, and there is no water drop on the film, and the water permeability is good. The temperature in the shed is 4 to 5 degrees higher than that of the dripping film, which is favorable in winter. Shetley grows and safely winters. There is no water drop under the membrane, and the humidity in the greenhouse is small, which greatly reduces the occurrence of various diseases. High temperatures in the shed, good light, and light disease are important conditions for the high yield and efficiency of sheds. Dripping film is resistant to aging. Generally available for more than 2 years. But no drip film than the major, film thickness 10-12um, covering 100m long shed about 125-130kg, the price is higher than the drop film 20% to 30%. Film width is generally 3-4m, use adhesive. This film is good for spring fruit and vegetable production.
After the drip film (polyethylene film) is covered, a large number of water droplets can be accumulated on the inner surface of the film, which seriously affects the light transmittance. The temperature in the shed is low and the light is weak. Drops of water will drip on the ground at any time. The humidity in the greenhouse is heavy and the disease is heavy. This is not conducive to the growth of vegetables in winter, and the yield of fruits and vegetables is poor. Drop film width 8-10m, covered without bonding. The proportion of small, film thickness of 7-Sum, covered 100m long shed only 70-80kg. cheap price. It is suitable for the production of leafy vegetables and cold sheds that are resistant to low temperature and low light such as leeks and celery.
The composite membrane combines three major advantages of dust resistance, aging resistance, and no drip. The specific gravity, thickness, and price are close to that of a non-drip film, which is an ideal film for use in vegetable greenhouses in winter and spring. However, when using it, you must face it up to receive good results.
The violet film absorbs and reflects violet light. Purple light can control the length of vegetables and stems, cover the purple film.
Reduce the purple light in the shed, can promote the lush foliage, so that the main stem and leaf vegetables such as leek, celery, cabbage, lettuce, rape, spinach, garland chrysanthemum, coriander, shallot, garlic, etc., can not only increase production, It also improves quality and has high yield and high efficiency.
Shetley produces only different vegetables and shed structures based on her own cultivation. Scientific selection of shed film can achieve high yield and high efficiency.
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