Base fertilizer: Huanghuai tobacco area, Shandong area is 200 to 300 kilograms of fertilized round fertilizer per 10 m2 of surface, plus 1 to 2 kg of superphosphate. Organic fertilizers must be fully decomposed, and do not contain tobacco leaf debris and rotten leaves of Solanaceae plants. In the southwestern tobacco-growing areas, such as Yunnan and Guizhou, the soil is covered with ash and soil, 2100-150 kg per 10 m, and 75-150 kg of decomposed manure is added, and 1 to 2 kg of superphosphate is added.
Top dressing in seedling stage: generally use liquid fertilizer, nitrogen, phosphorus, potassium fertilizer combined with application, first less and more, from light to thick. When the seedlings are young, if the nutrient concentration is too high, especially if the nitrogen is too much, the seedling growth will be inhibited. Immediately after topdressing, water should be poured with clean water to wash away the fertilizer on the leaf surface. The amount of fertilizer solution is: 100 grams of ammonium sulfate per 100 meters, 100 grams of superphosphate, 50 grams of potassium sulfate. Soak on the day before fertilization, and spray the supernatant. The first top dressing is carried out in the cross section of the tobacco seedlings. Afterwards, the number of second top dressings can be doubled for the first time.
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