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在铜仁地区中等肥力土壤上研究施N量对烤烟产质的影响。结果表明，烤烟的最佳施N量为8～9kg／667m2，N：P2O5：K20为1：2：3，产量182．2～195．1kg／667m2，产值853．48～907．04／667m2，均价4．65～4．69元／kg，上中等烟84．0％～87．3％，焦油含量21．25～24．18mg／g，烟叶内含香气物质9．29×108（总峰面积）。烟叶香型为中间香型。
Effect of N Application on Yield and Quality of Flue - cured Tobacco in Medium Fertility Soils of Tongren Region. The results showed that the best N application rate was 8 ~ 9kg / 667m2, the ratio of N: P2O5: K2O was 1: 2: 3 and the yield was 182.2 ~ 195.1kg / 667m2 with the output value of 853.48 ~ 907.04 / 667m2 , The average price of 4.65 ~ 4.69 yuan / kg, the upper middle-grade smoke of 84.0% to 87.3%, the tar content of 21.25 ~ 24.18mg / g, the aroma of tobacco leaves containing 9.29 × 108 ( Total peak area). Aroma of tobacco for the middle flavor.