With the wide use of agricultural plastic film, there are more and more types, but the effects are different, and each has its own advantages.
Therefore, it is necessary to make a reasonable choice according to the type of crop and the purpose of use. Black agricultural plastic film. Low light transmittance, only below 10%, covered in grassy areas, can make the weeds unable to get the necessary sunlight after germination, the grass killing effect is stable and reliable, and save labor; black film slow temperature, water retention performance Well, in the hot season, the cover of the cool vegetables, less heat, less evaporation, and promote growth, such as the use of shade nets, cooling effect is more obvious. The suitable range is summer radish, Chinese cabbage, spinach, alfalfa, autumn cucumber, etc., and perennial crops or orchards are also very good for weeding. Green agricultural plastic film.
The green film is used, the green light is increased, and the visible light is reduced, thereby reducing the photosynthesis of the weeds under the mulch, and the growth is inhibited, thereby playing the role of killing grass; the green film is not as strong as the transparent film, but stronger than the black film. The membrane is beneficial to the growth of the aerial parts of the crop, and the yield increase effect is remarkable.
It is mostly used on vegetables such as strawberries, melons, tomatoes, eggplants, and peppers. It can generally increase the yield of tomatoes and eggplant by 22% and 49%, respectively, and also make the eggplants shiny and well colored. Red agricultural plastic film. It can transmit red light and can block the growth of other unfavorable crops to meet the demand for red light. It is used for rice breeding, covered beets, sugary; cultivated carrots, roots become thick; planted leeks, the leaves are thick, early harvest, high yield. Blue agricultural plastic film.
In low light conditions, the light transmittance is higher than that of the transparent film, and under the strong light condition, it is lower than the transparent film, so the heat preservation performance is good, the temperature rise is also fast, and the film temperature is generally higher than the transparent film 2 ° C - 3 ° C. Therefore, the membrane is mainly used for rice breeding, which is beneficial to cultivating short and strong seedlings, and is quicker after planting and has more tillers.
Can also be used for crops such as vegetables, strawberries, and peanuts. At the same time, it has a good inhibitory effect on the black spot pathogen of cruciferous vegetables. 5. Purple agricultural plastic film. It can increase the light transmittance of purple light, which is beneficial to the increase and accumulation of nutrients in crops, which can increase yield and improve quality. It is mainly used for the cultivation of solanaceous fruits and green leafy vegetables in winter and spring or plastic greenhouses. Yellow agricultural plastic film.
Covering the yellow film, it can increase the yellow light and pass through the red, yellow and orange light, and can eliminate the blue and purple light. Covering cucumber can promote the flowering of the bud and increase the yield by more than one time.
Covering the celery can make the plant tall and prolong the edible period. Silver gray agricultural plastic film. It has the function of reflecting ultraviolet rays, repelling aphids and whitefly, reducing the virus disease of crops, and also has the repellent effect on yellow stripe, yellow squash and weevil; it can also inhibit the growth of weeds and has good water retention effect. It is suitable for disease prevention and heat-resistant cultivation in spring or summer and autumn, such as solanaceous fruits, melon vegetables and tobacco. The company launched the related products with plastic film cleaning equipment.