Effects of the Ratio between Base Fertilizer and Dressing and Application Manner on Yield and Quality of Flue-cured Tobacco

Experiment results pointed out that tobacco nicotine contents are affected by the ratio between base fertilizer and dressing. Tobacco nicotine content adopting 7∶3 of base fertilizer to dressing is significantly less than that adopting 6∶4 of base fertilizer to dressing, and nicotine content of upper tobacco leaf is obviously lower than that of middle and lower tobacco leaf. The result of smoking appraisal showed that tobacco quality adopting 7∶3 of base fertilizer to dressing is superior to that of 6∶4 of base fertilizer to dressing. Drilling base fertilizer had no optimal effect on tobacco quality. Manners of organic manure mixed mineral fertilizer had stable effect on tobacco quality. They not only increased tobacco yield and average price but also improved smoking smell of tobacco and decreased irritant of tobacco. Though leaf spray fertilizer did not change agronomic character and chemical component of tobacco and index of yield and quality, but it could raise scent content and improve scent quality of tobacco and together the irritant of tobacco could be raised to some extent.