Sunshade net is mainly used in summer, especially in the south. Some people describe the northern winter as a white (thin film), and the southern summer is black (covering the sunshade). In summer, the cultivation of vegetables in the south is a major technical measure to protect against disaster. Northern applications are limited to summer vegetables. Summer (6-8 months) covering sunscreens is mainly used to protect the sun from the sun, the impact of rainstorm, the damage of high temperature, and the spread of diseases and pests, especially to prevent the migration of pests.
After the summer coverage, it will be a kind of blocking, rain, moisture, cooling effect; After the winter and spring cover, there is a certain heat preservation and humidification.
After moisturizing principles: Sun-shade net cover, because the cool wind effect, down area air cover and the outside world communication speed, is obviously increased further air relative humidity, at noon, the added value of humidity, the largest one of 13-17%, high humidity, soil evaporation decreased, increased the soil moisture.
Sun-shade net is to use polyethylene (HDPE), HDPE, PE, PB, PVC, recycling materials, new materials, such as poly (ethylene propylene as raw materials, the ultraviolet stabilizers and anti oxidation treatment, with strong tensile resistance, ageing resistance, corrosion resistance, radiation resistance, light, etc. It is mainly used for the protection cultivation and aquaculture of vegetables, incense, flowers, edible fungi, seedlings, medicinal herbs, ginseng, etc., which have obvious effects on improving yield.