不同打顶方式对烤烟上部叶化学成分的影响  

Effect of Different Topping Ways on Chemical Compositions in Upper Leaves of Flue-cured Tobacco

作　　者：郭东海[1] 朱列书[1] 宋正熊[1] 王祖富[1] 尹佳[1] 廖雪芳[1] 岳伦勇[1] 

机构地区：[1]湖南农业大学农学院,湖南长沙410128

出　　处：《江西农业学报》2014年第4期83-85,共3页Acta Agriculturae Jiangxi

摘　　要：通过研究打顶方式对上部叶烟碱、还原糖、钾等主要化学物质的影响,实现优化烟叶等级结构。研究表明:完全打顶(处理1)的烟叶,单叶重过重,烟碱含量高,钾素低,糖碱比不协调;不打顶(处理4)的烟叶尽管烟碱降低,钾素含量升高,但由于单叶重降低,糖含量过低,糖氮比不协调,同样不具备可用性;处理3的烟叶单叶重高,糖氮比适宜,相比不打顶处理的烟碱含量降低,钾含量升高,因此打顶留花苞15个是改善上部叶可用性的一种方式。In order to optimize the grade structure of flue - cured tobacco leaves, we researched the effects of different topping ways on the main chemical compositions （nicotine, reducing sugar, potassium, etc. ） in upper leaves of tobacco. The results indi- cated that the complete topping （ treatment 1 ） caused single - leaf weight to be overweight, nicotine content to be high, potassium content to be low, and sugar - nicotine ratio to be inharmonious. No topping （treatment 4） could reduce nicotine content and in- crease potassium content, but it led to the decrease in single - leaf weight and reducing sugar content as well as the inharmony of sugar- nitrogen ratio. Partial topping plus reserving 15 buds （treatment 3 ） increased single -leaf weight, and made sugar -nitro- gen ratio harmonious; the nicotine content was lower and potassium content was higher in treatment 3 than those in treatment 4. Therefore, partial topping plus reserving 15 buds was a way to improve the usability of upper tobacco leaves.

关 键 词：烟草 打顶 留果数 糖碱比 去脉单叶重 

分 类 号：S572[农业科学—烟草工业]