Tobacco is one kind of both yield and quality of crops, fertilizer requirements are very strict, good or bad fertilization technology directly affects the growth and development and yield and quality of tobacco formation, thus affecting improve efficiency. Tobacco has four stages: seedling stage, group stage, prolonged period and maturity stage. The seedling stage includes the seedling stage and the slow seedling stage after transplanting. During this period, the nutrient uptake of nitrogen, phosphorus and potassium is not large. After transplanting the seedlings in the field, the growth of stems and leaves is gradually accelerated, and the vegetative growth is still dominant due to the growth of the soil, and the demand for fertilizer and water is significantly increased. From the group to the bud, the tobacco plants enter a period of vigorous growth, and the critical period of leaf number, leaf area and leaf weight is also an important stage to determine yield and quality. At the maturity stage, the absorption of nutrients by tobacco is significantly reduced, and fertilization is avoided to facilitate the timely fall of yellow to form high-quality smoke.
In the seedbed period, the bio-organic fertilizer can be applied alone, and the dosage is 2 kg per square meter . Field fertilization has two methods: base fertilizer and topdressing. The base fertilizer is selected from bio-organic fertilizer, and is applied to the soil before transplanting. The amount of the acre is 200 kg, and the application is carried out by a hole or a ditch. Tobacco likes potassium fertilizer and nitrate nitrogen fertilizer, avoids chloride ion, and combines with bio-organic fertilizer to apply a certain amount of ammonium nitrate and potassium sulfate or potassium nitrate, which is beneficial to tobacco growth and quality improvement. Tobacco topdressing is mainly based on the combination of available nitrogen fertilizer and bio-organic fertilizer. The fertilization time is to catch up with the fertilizer at one time. Nitrogen fertilizer is generally used ammonium sulfate or urea, 5 to 10 kg of urea or 10 to 15 kg of ammonium sulfate, 40 to 50 kg of bio-organic fertilizer, and fully mixed with quick-acting nitrogen fertilizer and bio-organic fertilizer during fertilization. Shi or acupoints.
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