The sunshade net is made of polyethylene as raw material, added with anti-aging agent, and woven by wire drawing. The width can be up to 8 meters without splicing, and it is divided into round wire and flat wire. Among them, the flat wire shade net is usually two needles, three needles and six needles, and the round wire is mostly nine needles. After the shade net is covered in summer Play a role in blocking light, rain, moisturizing and cooling. In addition to breathability, it also has a certain degree of light transmission, so that plants cannot see sunlight. After covering in winter and spring, there is a certain heat preservation and humidification effect. Because the shade net is breathable, the surface of the leaves will still be dry after covering, which can reduce the occurrence of diseases.
When covering the shade net, the management of the shade net should be strengthened according to weather changes and different periods of crop growth. Before emergence, the net should be covered all day, and after emergence, the net should be opened in the morning and evening to see the light, and covered at noon when the sun is strong. In cloudy days, you can leave it open all day, but you must cover the net in time before the rainstorm. The width of the shade net can be cut and spliced arbitrarily. Cut with high heat to prevent the sunshade mesh from loosening. Cover the sunshade net directly on the ground or on the plant, usually at the time of sowing and after planting.
For covering the shading net on the arched support of the small film arch shed, it is suitable for shading, cooling, ventilation in summer and autumn, or frost protection at night in early spring, and can also be used for rain protection in rainy season or insulation at night in winter and spring.
The main purpose of covering the sunshade net in each growth stage of the crop is to cover after sowing. The main purpose is to maintain soil moisture and prevent soil compaction after heavy rain. Prevent pests and birds from harming. The method is generally to cover directly on the ground, but the net should be opened in time after emergence, so as not to hinder the growth of seedlings. There is also short-term coverage after planting. One is to cover cabbage, cauliflower, Chinese cabbage, celery, lettuce, etc. after planting in summer and autumn, and cover them until they survive, and cover them day and night, which can be directly covered on crops; The other is to cover the solanaceous fruits, melons and beans planted in early spring in the evening to prevent frost.
Post time: Jun-02-2022