Tobacco leaf cultivation method

The invention provides a tobacco leaf cultivation method. The tobacco leaf cultivation method comprises the following steps: a, soil ploughing; b, ridging the soil, and applying a base fertilizer during ridging; c, transplanting is conducted, the transplanting density is 1000-1200 plants per mu, the ridge height is 40-45 cm, and the ridge bottom width is 60-80 cm; topdressing is conducted from the tenth day to the 45th day after the tobacco seedlings are transplanted; the potash fulvate fertilizer is dressed on the 27th-33rd day, the 42nd-48th day and the 57th-63rd day after the tobacco seedlings are transplanted, and the dressing amount each time is 4-6kg/mu; monopotassium phosphate leaf fertilizer is sprayed twice after topping of tobacco plants and before harvesting, and the dosage of monopotassium phosphate is 190-210g/mu each time; and d, applying a chloride ion channel inhibitor 45-70 days after the tobacco seedlings are transplanted. According to the tobacco leaf cultivation method, the potassium-chlor