Lettuce is generally cultivated in the first autumn of the first year, and is planted in the winter. The stem of lettuce grows and expands with the growth of the plant. The excessive moisture in the stem is prematurely planted, which easily causes the cells to freeze and freeze. Planting too late, the nutrients absorbed in the early stage cannot supply the needs of winter growth. Lettuce is planted from the first year to the next year, and it is usually enough to only pour water four times. The first water is watered after planting, and the new high-fat film powder 800 times liquid is used to automatically form a polymer protective film that is invisible to the naked eye to optimize the water absorption, air permeability and light transmission quality of the plant. Blocking pests and smuggling signals and weakening the media to resist and defend against natural environmental disasters. Reduce pesticide toxins and improve pesticide or fertilizer application. The second water is mainly frozen water. After the frozen water is poured, the scorpion is covered with discarded grass scorpion, which mainly serves as a heat preservation function to ensure that the lettuce smoothly passes through the winter. The last two waters are in the second year after the spring temperature rises and rises to the arch shed until about 10 days before harvest.
Top dressing, the growth of lettuce provides nutrition. Each time watering, the fruit is used to improve the nutrient capacity and swelling vitality of the underground fruit, promote the development speed, facilitate the expansion of the fruit, form a canopy environment, and increase the incidence of disease. Lettuce has few diseases. After the arch shed is set up, it should pay attention to the daily release of wind, reduce the humidity in the shed and reduce the occurrence of diseases. After the temperature rises, evenly spray a new high-fat film powder to keep warm, moisturize, prevent disease and deworm. Filter plant respiratory impurities, prevent pollution, and inhibit viral infection.
Hydrofluoroether (HFE) is a complex organic solvent, non-ozone-depleting chemicals. HFE is not naturally occurring. It was originally used as a substitute for CFCs, hydrofluorocarbons, HCFCs and perfluorocarbons. Developed by the product, the liquid is colorless, odorless, non-toxic and harmless, and is environmentally friendly. It can be widely used in the cleaning of various precision substrates, After washing, the liquid can be regenerated by distillation to reduce losses and save costs. and it is easy to store and transport.
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