What are the precautions for growing tobacco with plastic film mulching?
What should be noted when growing tobacco with plastic film mulching? Land preparation, ridging and fertilizing. In areas with a tobacco-rice rotation, the tobacco leaves must be fully transplanted by mid-March, so you must seize the favorable weather before February to prepare the land, ridge it and apply fertilizer well. After ridging, apply herbicide, then make holes and apply hole fertilizer, and break up the topsoil so it can be covered with film. Film covering. The soil surface...
What should be noted when growing tobacco with plastic film mulching?
Land preparation, ridging and fertilizing. In areas with a tobacco-rice rotation, the tobacco leaves must be fully transplanted by mid-March, so you must seize the favorable weather before February to prepare the land, ridge it and apply fertilizer well. After ridging, apply herbicide, then make holes and apply hole fertilizer, and break up the topsoil so it can be covered with film.
Film covering. The soil surface must be moist; the film can only be laid when the water-holding capacity reaches 80%. Otherwise, the film must not be laid. When laying the film, it must fit closely against the bed surface, be stretched tight and straight, and be pressed firmly on all sides with soil, so that it is firm enough that the wind cannot move it.
Transplanting tobacco. For cultivation under the film, if the film is laid well before transplanting, lift one side of the film when transplanting, plant the seedlings well, water to settle the roots, then cover the film again. If the film was not laid before transplanting, cover it immediately after transplanting. If cultivating on top of the film, open a small hole at the punched spot on the bed surface, plant the tobacco seedling into the hole, water with root-settling water and fertilizer, then press soil firmly around the film opening.
Check seedlings and fill in missing hills. Within 7 days after transplanting, inspect the tobacco field and promptly fill in missing hills when dead seedlings are found.
Open holes to lift the seedlings. For tobacco seedlings grown under the film, when the leaves grow to the point of pressing against the film, holes must be opened promptly, or when the temperature inside the film exceeds 30°C, open holes promptly so that the tobacco seedling leaves are exposed above the film, and press soil firmly around the openings. Otherwise, the tobacco seedlings will be scorched.
Remove the film. When the tobacco seedlings have been covered with film for about 40 days, or have grown to the rosette stage, the film must be removed promptly. The residual film must be removed completely and disposed of in a centralized way; it must not be thrown away everywhere.
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