What is the function of plastic film? How to lay

Function: It can raise ground temperature, preserve water, soil and fertilizer, improve fertilizer efficiency, and also has many functions such as weeding, insect prevention, drought and waterlogging prevention, salt suppression, seedling protection, improving near-surface light and heat conditions, and making products sanitary and clean. For those newly unearthed seedlings, it can protect roots and promote growth. The effect of increasing plant production and income is particularly remarkable.

Method of spreading plastic film: one person pulls it on the ground with his hand, and the other person compacts it on the soil, then straightens and stretches the plastic film and continues to put it on the ground, then compacts it with soil, and then covers the edge with soil. Pay attention to cover the seedling tray with plastic sheets. After the seeds germinate, tear the plastic film to expose the seedlings.

Definition: Plastic film is ground covering film, usually transparent or black PE film, but also green and silver film, which is used for ground covering to raise soil temperature, keep soil moisture, maintain soil structure, prevent pests from harming crops and diseases caused by some microorganisms, and promote plant growth.

Technology: Plastic film is a polyethylene product in petrochemical products. The plastic film mulching technology in China was introduced from Japan in 1978. In the first few years, it was developed and tried in Northeast China, Beijing, Shanghai and Inner Mongolia 13 provinces, cities and autonomous regions. Through the production demonstration in 16 provinces and cities, it is determined that it is a science and technology suitable for promoting the transformation from traditional agriculture to modern agriculture in this land of China. Since 1983, it has been widely promoted nationwide as a national key promotion project.

New technology: Multifunctional mulch film for irrigation is a well-known expert and senior agrometeorological engineer in agricultural water-saving reserve, Zhang Zhaoxing has repeatedly practiced and perfected it all over the world, which has made ordinary mulch film have many new features and advantages. Its main body is plastic film. The film surface is planned as base film and groove film, the groove bottom line is parallel to the longitudinal bisector of the film, and the two sides are ridge lines respectively. The border film is divided into clear water film and soil covering film, and the soil covering line is parallel to the border bottom line. The open side of the clear water film blocks the soil capillary water suction hole, and the open sides of the soil covering film block the soil capillary tube bundle hole. This multifunctional plastic film for irrigation has many advantages, which overcomes the disadvantages of gravity water irrigation, realizes automatic irrigation of soil capillary holes, multi-directional and multi-directional three-dimensional irrigation, has wind resistance, and can collect rain, store water and save water in the field. Organic fertilizer and chemical fertilizer can be applied; Organic combination of rainwater collection, water storage, irrigation, water saving, fertilization and plastic film mulching; Can be used for various shapes of flat land, sloping land, ditch land and pit land [1]? .