|Shading net, also known as shading net, is a new type of protective cover material for agriculture, fishery, animal husbandry, windproof and cover soil that has been promoted in the past 10 years. 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 degree of heat preservation and humidification.|
Generally, the leafy vegetables grown in winter and spring cover the surface of the leafy vegetables directly on the surface of the leafy vegetables (floating surface) to prevent low temperature damage. Because of its light weight, it is only about 45 grams per square meter, and it has grown into high leafy vegetables. It will not overwhelm, bend, and reduce the commerciality. Because it has a certain permeability, the surface of the leaves after the cover is still dry, reducing the occurrence of diseases. It also has a certain light transmission, and it will not be "Smashed and smashed" After covering. In 1997, henan agricultural university in the longtang vegetable park of linyi county, the winter shed celery, which had been basically grown, was covered with floating surface protection for cold protection in the shed. It was found that the sunshade net surface covered by the outside -6 °c the celery leaves did not find a large number of ice icing; while the single-layer shed control, especially the middle and upper leaves, had been frozen and hardened, and the coverage was 1.5 ° c higher than the control temperature.