In the past two years, with the rapid development of high-yield, high-efficiency, and high-quality agriculture in China, especially the rapid expansion of vegetable greenhouses, various colored agricultural films have been widely used in agricultural production. The use of non-ferrous agricultural film can be used properly. The effects of increasing production, increasing income, and preventing disease, if not properly applied, are often counterproductive and the consequences are incalculable. The correct application methods for the nine kinds of colored agricultural film are introduced as follows for reference by farmers' friends in production practice. First, black film. Serious weeds or high-temperature season cultivation of summer radish, cabbage, spinach, autumn cucumbers, late tomatoes, the choice of black film is better. Second, the purple membrane. The film is mainly suitable for the cultivation of solanaceous and green leafy vegetables in greenhouses or plastic greenhouses in winter and spring, which can improve the quality and increase the yield. Third, the yellow film. According to experiments, celery and lettuce were covered with a yellow film, plants grew tall, bolting was postponed, and beans grew robustly. Overlaying cucumbers promoted flowering and budding, increased yield by 1-1.5 times, and covered tea trees. The quality of tea was superior and the yield was improved. Fourth, the red film. Production practices have demonstrated that rice seedlings grown under the red film are well-produced; beet sugar content is high; carrot straight roots grow longer; Chinese chive leaves are broad and fleshy, the harvesting period is advanced, and yield is increased. Fifth, the blue film. It is mainly suitable for rice seedlings, which is conducive to the cultivation of dwarf seedlings. It can also be used for vegetables, cotton, peanuts, strawberries, beans, eggplant, sweet peppers, tomatoes, melons and other vegetables and other economic crops. The role of grass. Six, silver gray film. It is mainly suitable for the cultivation of summer vegetables, melons, cotton and flue-cured tobacco, and has good disease prevention, anti-worm and whitefly effects and improves quality. Seven, silver reflective film. It is mainly used for greenhouse vegetable cultivation. It can be hung in the greenhouse to cultivate the northern side of the loquat and improve the lighting conditions in the greenhouse. Eight, silver and black double-sided film. The film is a composite of milk grey and black film. Covered with silver gray film on the film, black film under, with a variety of functions such as avoiding disease, preventing weeding and water retention. Mainly suitable for summer and autumn vegetables, melons and other disease-resistant heat cultivation. Nine, black and white color film. When covered, the white is on top, and the black is on the bottom. It is mainly suitable for heat-resistant cultivation of vegetables and melons in summer and autumn. With a good effect of lowering the temperature, the water retention and weed control effects are also very good. The film is used for ground cover cultivation of cool vegetables such as radish, cabbage, and lettuce, which can grow well in summer.
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