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以云烟85为材料,在施纯氮97.5 kg/hm2的水平下,研究不同施肥方式、打顶时期和留叶数不同组合处理对烤烟产质量的影响。结果表明:(1)采用70%底肥+30%追肥的常规施肥方式,50%现蕾打顶,打顶留叶数在20片时,烟株农艺性状表现出较强的优势,经济性状也表现较佳,尤其是产量和中上等烟率均优于其他处理。烟叶化学成分含量适宜,比例协调,烟叶物理性状综合表现最好。(2)在留叶数相同的情况下,打顶时期相对越早,烟株所表现出的农艺性状及经济效益越好。(3)同一打顶时期,留叶20片的农艺性状、产值、产量优于留叶22片的处理。在施纯氮97.5 kg/hm2的水平下,常规施肥方式+50%现蕾打顶+留叶数20片的处理可以获得较好的产质量。
Taking Yunyan85 as material, the effects of different fertilizing methods, top-dressing period and leaf number on the yield and quality of flue-cured tobacco were studied at the level of pure nitrogen 97.5 kg / hm2. The results showed that: (1) Agronomic traits of tobacco plants showed a strong advantage when using conventional fertilization methods with 70% base fertilizer and 30% top dressing, 50% The performance is better, especially the yield and middle and upper smoke rate are better than other treatments. The content of chemical components of tobacco is appropriate, the proportion of coordination, the best overall physical performance of tobacco. (2) With the same leaf number, the relatively earlier topping period, the better the agronomic characters and economic benefits of tobacco plants. (3) During the same topping period, the agronomic traits of 20 leaf leaves, the output value and output were superior to those of 22 leaf leaves. Under the condition of applying pure nitrogen of 97.5 kg / hm2, the conventional fertilization method + 50% budding + top leaf number of 20 leaves can get better quality.