A Fertilization Method for Reducing Chlorine Content in First-cured Tobacco Leaves

Abstract

The invention discloses a fertilization method for reducing content of chlorine in flue-cured tobacco. The fertilization method comprises the following steps: 1) 30-40 days before the transplanting oftobacco plants, turning over and pressing with rice straws, wherein the turnover amount is 350-450kg / 667m<2>; 2) 0-3 days before transplanting, and before the ridging of a tobacco field, mixing 20-30kg / 667m<2> of a cake fertilizer with 20-30kg / 667m<2> of a special tobacco composite fertilizer, and fertilizing in a strip manner; 3) 30 days after the tobacco transplanting, applying 20-30kg / 667m<2>of potassium nitrate in a drip fertigation mode; 4) applying the potassium nitrate within 30-37 days, 37-44 days and 44-51 days after transplanting, and controlling a fertilizer concentration within 0.3-0.5% each time; 5) controlling the nitrogen, phosphorus and potassium ratio of all chemical fertilizers within 1-2.5 to 1-3.5. By adopting the fertilization method, the content of chlorine in the flue-cured tobacco can be effectively reduced, the quality and the industrial usability of the tobacco can be improved, the yield and the production value of the tobacco can be increased, the economical benefit of the tobacco can be increased, physical and chemical properties of tobacco planting soil can be improved, and the quality of the tobacco planting soil can be improved.

Description

Technical field[0001]The invention belongs to the field of flue-cured tobacco planting, and specifically relates to a fertilization method for reducing the chlorine content of the flue-cured tobacco leaves.Background technique[0002]Chlorine is an essential trace element that is most demanded during the entire growth and development of tobacco. It is generally believed that the appropriate chlorine content of tobacco leaves should be less than 0.8%. Within the appropriate chlorine content range, high turgor pressure of tobacco leaves with high chlorine content, large erect leaf area, sufficient sunlight absorption, high photosynthesis efficiency, and promotion of tobacco leaf yield. Tobacco leaves are soft in texture, good in swelling, easy to cut into shreds and not easy to break, which is beneficial to the processing of cigarette enterprises.[0003]Excessive chlorine content will reduce the quality of tobacco leaves: when it is greater than 1.0%, the tobacco leaves will become light...

AI Technical Summary

Problems solved by technology

[0003] Excessive chlorine content will reduce the yield and quality of tobacco leaves: when it is greater than 1.0%, the color of the tobacco leaves will become light, dull, and difficult to shred. At the same time, it will reduce the organic acid salts of potassium, which will indirectly lead to poor combustibility and increase the possibility of flameout ; When it exceeds 2.9%, the tobacco plant will show the symptoms of chlorine poisoning, especially the tobacco leaves, the leaf edge will turn up, the middle and lower tobacco leaves will turn yellow, the upper tobacco leaves will be dark green, and there will be an unpleasant smell when burning, and the tobacco leaves will not be able to hold fire at all , can not meet the needs of industry

[0004] At present, the reduction of leaf chlorine content is generally achieved simply by increasing and reducing the soil chlorine content. Under this technical method, the controllability of the chlorine content of the first-cured tobacco leaves is not high, which affects the quality of the tobacco leaves; To achieve chlorine reduction in tobacco leaves, the yield and output value of tobacco leaves are often low due to excessive loss of nutrients, which affects the enthusiasm for the production of high-quality tobacco leaves

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