The fertilization technology of tobacco fields is good or bad, which is related to the development of tobacco leaves throughout the growth period, and is closely related to the quality of tobacco leaves. Here are some of the six key points you should master in tobacco field fertilization technology:
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Key point 1: The guiding principle of fertilization. Fertilization should be consistent with the growth pattern of tobacco leaves. In the early stage of tobacco growth, the main stalks increased the amount of stalks, so the amount of fertilization was large. At the later stage, the dry matter accumulation of the leaves was promoted, and the yellowing was achieved smoothly, so the amount of fertilizer was also small. The general role of fertilization and fertilizer efficiency should be “to come rich, old to be poorâ€.
Point 2: Reasonable combination of fertilizer types. The fertilizer needed for the tobacco field is divided into inorganic fertilizer and organic fertilizer. Organic fertilizer is beneficial to improve soil structure, and contains more elements, but the tobacco plant absorbs slowly, while the chemical fertilizer transforms quickly, and the tobacco plant absorbs quickly. However, long-term application easily leads to soil compaction. According to production practice, the nitrogen content is used as the standard. Organic fertilizer accounts for 1/3 of total fertilization .
Key point three: scientific compatibility of NPK. The key is the scientific determination of the amount of nitrogen applied per mu. The amount of nitrogen used in the mu should be determined according to the local rainfall, irrigation conditions, soil conditions, and characteristics of the variety. A suitable ratio of NPK should be 1 : 2 : 3 or 1 : 2 : 2 .
Point 4: Rational use of nitrate nitrogen and ammonia nitrogen in nitrogen fertilizer. For nitrate nitrogen, the tobacco plant can be directly absorbed. It should be applied at the point of transplanting or topdressing. In contrast, the ammonia nitrogen smoker can absorb slowly and can be used as the base fertilizer. The ratio of the two nitrogens is generally 50%. . The nitrate nitrogen applied to the acupoints can be about 1 pure nitrogen per mu .
Point 5: Precautions for fertilization in tobacco fields: Urea, human urine should not be used as fertilizer for tobacco fields, chemical fertilizers containing chlorine and contaminated farmland fertilizers should not be used. The application of micro-fertilizers should be tested by soil, according to the principle of deficiency of sputum. Moderate application.
Point 6: Fertilization methods and timing. Farmyard manure should be applied evenly before plowing the field twice. After the fermented cake fertilizer, compound fertilizer, phosphate fertilizer, and potassium fertilizer, it can be combined with the sputum to open the ditch. Whether or not top dressing depends on the growth of the tobacco plant in the group period . If the fertilizer is lacking, the nitrate can be applied to the longest leaf tip, and the amount of nitrogen should be cautious. Leading to black smoke in the later stages of tobacco.
The ecological conditions of each tobacco area are quite different. The characteristics of each tobacco leaf variety are different. The methods and dosages of fertilization should be tested and compared, and the optimal scheme should be selected and taken out to promote the good development of tobacco leaves and improve the quality of tobacco leaves.
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