Some vegetable farmers usually cover the black shade net. In the sun, the black shade net will absorb a lot of heat. There are two disadvantages of the black shading net being tightly adhered to the shed film: one is that the heat absorbed by the black shading net is easily transferred to the shed film, which increases the temperature of the shed film, accelerates the aging of the shed film, and reduces the service life of the shed film; The heat absorbed by the shading net is not easy to dissipate after being transferred to the greenhouse, that is to say, the heat loss is slow, and the shading net cannot play a good cooling effect. So, how to cover the sunshade net?

Blue Side Black Shade Net 105GSM 6120

The shade net should not be tightly adhered to the shed film. It is recommended that vegetable farmers support the shading net and keep a distance of at least 0.5-1 meters from the shed surface, so that the air between the shading net and the shed surface can be circulated and the heat loss in the shed can be accelerated. After the sunshade net is properly covered to cool down, the sunshade net is not static, but should be flexibly adjusted according to weather conditions, vegetable types, and light intensity and temperature requirements during the growing period of vegetables. Generally, it is covered on sunny days, but not on cloudy days; it is covered at noon, but not in the morning and evening; it is covered in the early stage of vegetable growth, but not in the later stage. Even if it's sunny, you can't cover the umbrella for a long time. The coverage time is concentrated in the period of strong sunshine at noon, and the specific use time is from 10:00 am to 3:00 pm.

For the vaulted shed, it is difficult to set up due to its large area, and it takes time and labor to uncover the cover. For this reason, many vegetable farmers choose to move the awning into the greenhouse, hang it from north to south, and fix it with iron wire. Just like the 2nd layer of the winter arch shed, the awning can be unveiled in time according to the actual weather conditions, which is convenient and flexible. But does this method of hanging parasols work?

We believe that there is a big disadvantage. This is because the sunshade net is not easy to dissipate heat when it is moved into the shed, and the cooling effect is not as good as that of the external sunshade net. However, due to the convenience of operation, it is more suitable for the seasons with strong light but not too high temperature in early summer and early autumn. After all, in the high temperature season, the cooling effect of the outer shading net is better than that of the inner shading net. Therefore, it is recommended that vegetable farmers choose the appropriate method of hanging nets according to seasonal changes.