Shading nets are mainly used in summer, especially in the south. The use of shading nets to cultivate vegetables in the south in the summer has become a major technical measure for disaster prevention protection. Northern applications are also limited to summer vegetable seedlings. In summer (june-august), the main function of covering the sunshade net is to prevent the sun from illuminating, the impact of anti-storm, the danger of high temperature, and the spread of pests and diseases, especially to prevent the migration of insects.
After the summer cover, it plays a role of blocking light, preventing rain, moisturizing and cooling; after winter and spring coverage, there is still a certain heat preservation and humidification effect.
Moisturizing principle: After covering the sunshade net, because of the cooling and windproof effect, the communication speed between the air in the masking area and the outside world is reduced, and the relative humidity of the air is obviously further increased. At noon, the humidity increase value is the largest, generally reaching 13-17%, and the humidity is high. Soil evaporation decreases, increasing soil moisture.
The outside sun shade net is made of polyethylene (hdpe), high-density polyethylene, pe, pb, pvc, recycled materials, new materials, and poly-ethylene-propylene. It is uv-resistant and anti-oxidation treatment. Anti-aging, corrosion resistance, radiation resistance, light weight and so on. It is mainly used for the protective cultivation of crops such as vegetables, sweet aunts, flowers, edible fungi, seedlings, medicinal materials, ginseng, and ganoderma lucidum, and aquatic poultry breeding industries, etc., which have obvious effects on increasing yield.