There are many advantages to using greenhouse sun shade net to cover cultivation in summer. The following points should be paid attention to in order to produce good results.

　　1. Scientifically select the greenhouse sun shade net of different specifications and colors, and the degree of shading of the greenhouse sun shade net is different; for different types of vegetables, the suitable light intensity for photosynthesis is also different. Therefore, the appropriate shade net should be selected according to the type of vegetables and the light intensity during the covering period.

　　2. Choose the appropriate covering method according to local conditions. In many areas in the north, greenhouses, greenhouses, middle sheds, small sheds and other protected land facilities are generally only used for thermal insulation and cold-proof cultivation in autumn, winter and spring, and are mostly idle in summer.

　　3. Standardized management work The main purpose of summer greenhouse shade net covering cultivation is shading and cooling, of which shading plays a leading role. The degree of shading is not only to choose a shading net with a suitable shading rate, but also to master the uncovering time. If the greenhouse shading net is covered and then covered to the end, side effects such as leggy, chlorosis, disease, yield reduction and quality degradation caused by high temperature, high humidity and weak light will occur.

　　The general principle of the discovery and management of greenhouse shading nets is: according to the weather conditions and the requirements for light intensity and temperature of different vegetables and different growth periods, the time for uncovering the cover should be flexibly controlled. The specific operating procedures are: before sowing, cover with floating surface, and open the net in the evening after emergence. If planting in the open field, a trellis is required, and the greenhouse shade net is covered on the trellis after sunrise the next day.