Generally speaking, dark shading net should be used for low light-loving crops such as ginger, short-growing crops such as fast-growing leafy vegetables and summer and autumn crops at seedling stage, while white shading net should be used for medium and strong light-loving crops or long-growing crops such as delayed cultivation of Eggplant and fruit vegetables. In terms of different cultivation seasons, black shading net is suitable for summer shading and cooling, and white shading net is suitable for winter freezing prevention.
It is not suitable to cover the whole shed with shelf materials in summer. Generally, the sunshade net is not covered in the area of 1-1.5 meters on the side of the shed to facilitate ventilation and prevent rotten seedlings; the floating surface covers the sunshade net, generally only after vegetable sowing to germination, it should be raised in time after seedling emergence and covered with the shed type; when the floating surface covers, the width of the sunshade net should be left enough space, and after covering, the sunshade net should be covered with nylon rope. Tighten and fasten all around to prevent being blown down by the wind.
Compared with plastic film covering, shading effect is better, winter can play a thermal insulation effect, summer can play a shading and heat absorption effect, and shading net can be used many times compared with plastic film, long-time exposure is not easy to damage, the effect is more obvious.