种植密度对烤烟生长和烟碱含量的影响

Effects of Plant Population on Growth and Nicotine Content of Flue-cured Tobacco

为解决烤烟上部叶烟碱含量偏高问题 ,通过田间试验 ,研究了东南烟区烤烟主栽品种K 32 6、云烟 85、翠碧 1号在不同种植密度 (1480、12 0 0和 10 2 5株 /6 6 6 .7m2 )下 ,烟叶生长发育、产质量和烟碱含量的变化。结果表明 :适当提高种植密度 ,①能降低各部位烟叶的单叶重 ,尤其是上部叶 ;②可有效减少上部烟叶的比例 ;③烟叶烟碱含量降低 ,烟叶的刺激性减轻、可用性 (特别是上部叶 )提高。

In order to reduce the excessive nicotine content of upper leaf,field experiments on effects of different plant populations (1480, 1200 and 1025 plants per 666.7m 2) on the growth, development, yield, quality and nicotine content of major flue-cured tobacco cv.K 326, Yunyan 85 and CB-1 grown in southeast tobacco growing areas were conducted. The results showed that by properly increasing the plant population, 1)the weight per leaf was decreased,especially for the upper leaf; 2)the proportion of the upper leaf was also reduced; 3)the tobacco leaf (particularly the upper leaf) had lower nicotine content, less irritancy and higher usability.