施氮量与留叶数对万源晒红烟产质量和香气成分的影响

为探究施氮量与留叶数对万源晒红烟产质量和香气成分的影响，以主栽晒红烟品种"万毛3号"为材料，设计不同施氮量与留叶数的栽培试验，对晒红烟农艺性状、经济性状和香气成分等进行测定分析。结果表明，随施氮量和留叶数增加，万毛3号的产量和产值上升，均价和上、中等烟比例先升高后降低。施氮量增加，烟叶的烟碱、钾含量显著上升，糖含量显著下降；中性致香成分总量显著升高，多种质体色素降解产物、苯丙氨酸转化产物和茄酮含量上升。留叶数增多，烟叶糖和钾含量显著升高，烟碱、总氮含量下降；中性致香成分总量和新植二烯、类胡萝卜素降解产物含量呈下降趋势，而苯丙氨酸类转化产物和棕色化产物含量显著上升。综合分析，在施氮15 kg/667 m²、留叶18片处理下，烟叶的产量较高，品质较优，感官质量评价好。

Effects of Nitrogen Rates and Numbers of Leaves Remained on Yield,Quality and Aroma Components of Sun-cured Red Tobacco

Wanmao 3, a major sun-cured tobacco cultivar in Wanyuan, Sichuan was experimented to explore the influence of different nitrogen rates and numbers of leaves on the yield, and quality, and aroma components of sun-cured red tobacco. Tobacco leaf samples from different growth periods and after curing were collected and analyzed. The results showed that with the increase of nitrogen rates and numbers of leaves, the output and yield of Wanmao 3 increased, average price and fine or medium tobacco increased first and then decreased. With the increase of nitrogen rates, the nicotine and K content increased significantly, the sugar content decreased significantly, and the aroma component contents increased significantly. And plastid pigments, phenylalanine conversion and solanone content increased significantly. This suggested that increased nitrogen rates at a reasonable level were beneficial to aroma amount in tobacco. With increased numbers of leaves, the sugar and K content increased significantly, nicotine and total nitrogen content decreased significantly. And the aroma components, neophytadiene and various of carotenoids decreased, but the phenylalanine conversion and browning product contents increased significantly. Based on comprehensive analysis, with 15 kg/667 m² of nitrogen rates and 18 leaves, tobacco leaves both have higher yield and quality, and the sensory quality is the best.