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(2) Wind-proof, rain-proof, disease-proof and insect-proof The shading net has high mechanical strength, which can slow down the loss of vegetables caused by typhoon, rainstorm, hail and other disastrous weather. The greenhouse is covered by a shading net. During a typhoon, the wind speed inside the shed is only about 40% of the wind speed outside the shed, and the wind blocking effect is obvious. The plastic greenhouse covered with the shading net can reduce the impact of the rainstorm on the ground to 1/50, and the rainfall in the shed can be reduced by 13.29% to 22.83%. The silver-gray sunshade net has obvious effect of avoiding aphids and can effectively reduce the spread and spread of viruses. Covering the net room with a shade net can prevent the damage of external pests and diseases. According to the test on autumn tomato, with silver-gray shade net covering, the incidence of plant virus disease is 3%, and 60% are not covered.
(3) Antifreeze and heat preservation In order to improve the utilization rate of the shade net and reduce the cost of covering, it can also be used for preventing early frost in late autumn, preventing late frost in early spring and preventing frost damage in winter. It has been determined that the silver-gray shade net can increase the surface temperature by 1.3 to 3.1 °C at night.