Plastic sunshade net is short for sunshade net, also known as cool yarn and cold yarn. It is a light, high-strength, anti-aging and net like new agricultural covering woven with polyolefin resin as the main raw material through wire drawing. The types of shading nets can be divided into black, white, silver gray, green, blue, yellow and black silver gray. The amplitude specifications include 90cm, 140cm, 150cm, 160cm and 200cm, with a service life of 3-5 years.
1、 Role of shading net
Shading and cooling, preventing rain, wind, moisture and frost
2、 Main points of shading net covering cultivation technique
1. Coverage mode of shading net
The shading net is covered by small arch shed, large shed, flat shed and floating surface.
2. Select appropriate shading net and cover reasonably
Generally, the black net with strong shading rate should be used for vegetables with weak light requirements, and the covering time should be short; The white net is suitable for covering the light loving vegetables and can cover the whole growth period. The management of covering and uncovering the black net should be strengthened. The net should be uncovered on cloudy days and in the morning and evening when the light is insufficient. The net should be covered on sunny days and at noon when the light is strong.
3. Comprehensive utilization
According to the different needs of spring, summer, autumn and winter, one network is used for multiple purposes, covering 5-6 times a year, and comprehensive utilization is carried out every year to reduce costs and improve comprehensive benefits.
4. Strengthen management
It is necessary to timely uncover the cover as much as possible. The principle of uncovered cover: uncovered in sunny days and uncovered in cloudy days; Heavy rain cover and light rain cover; Cover in the morning when the sun is strong, and open in the afternoon when the light is appropriate; The floating surface shall be fully covered after sowing and before emergence, and the cover shall be removed in time after emergence; In summer and autumn, the net should be removed 7-10 days before planting for seedling cultivation and coverage; Coriander, lettuce, onion and garlic cultivated in summer should be covered in the whole growth period.
After the shading net is covered, the vegetable crops need more fertilizer and water, and the fertilizer and water should be replenished in time.