Tobacco is a crop that is very sensitive to fertilizers. The type, dosage and ratio of fertilizer, fertilization period and fertilization method have a great impact on the yield and quality of tobacco leaves. If too little fertilizer is applied, the nutrient supply will be insufficient and the expected production purpose cannot be achieved; if too much fertilizer is applied, the key point of fertilizing tobacco leaves at each growth stage is: less at the two ends and more in the middle. Tobacco leaves do not need much fertilizer just after transplanting. During the peak period, tobacco leaves need the most fertilizer. During the harvest season, we must reasonably control the fertilizer and water of tobacco leaves. Tobacco leaf planting requires first cultivating the plants into seedlings, and then planting the fields. After sorting it out, set up the greenhouse, then arrange and level the seedbed, making it 1 meter wide, about 15cm high, and the drainage ditch is about 20cm. Soak the seeds in disinfectant for about 15 minutes, then rinse with water.

Reasonably control the fertilizer ratio of nitrogen, phosphorus and potassium. Tobacco leaves have a large demand for potassium fertilizer. Sufficient potassium fertilizer can promote photosynthesis on the leaf surface and facilitate the transportation of nutrients. Therefore, potassium deficiency in tobacco leaves will affect the growth of the leaf surface. The amount of nitrogen fertilizer needs to be carefully controlled. If there is too much nitrogen fertilizer, apply it early. top dressing. Generally, the first top dressing is started about 15-25 days after planting tobacco, mainly nitrogen fertilizer. The application method is to use 50 to 75 pounds of urea per mu or 100 to 150 pounds of ammonium bicarbonate mixed with 1,500 pounds of clear manure water. Apply again in 30-40 days according to seedling conditions.

Tobacco leaves are a crop that is extremely sensitive to fertilizers. The type, amount and ratio of fertilization, fertilization period, fertilization methods, etc. will all have a great impact on the yield and quality of tobacco leaves. Too little fertilizer application leads to insufficient nutrient supply and cannot achieve the expected production purpose; the tobacco growth period is 160 to 180 days, and the seedbed stage is about 60 days, which is divided into the emergence stage, cross stage, rooting stage and seedling stage. The field period lasts from 100 to 120 days and is divided into slow seedling stage, root extending stage, vigorous stage and mature stage. Generally, 1,000 kilograms of flue-cured tobacco leaves are produced.

The nitrogen to phosphorus ratio (N:P2O5) can generally be reduced from the past 1:2 to 1:0.5~1.0.

Under normal circumstances, after applying tobacco compound fertilizers of 12-12-24, 10-10-25, and 15-15-15, there is no need to apply calcium or calcium magnesium phosphate fertilizer;