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[目的]该试验在行距固定的情况下,通过设置不同株距,探究不同株距对烟叶等级结构、生育期、农艺性状、烟草产值及烤后化学成分的影响。[方法]在行距一定的情况下(120cm),设置四个处理(40、50、60、45 cm),分析比较不同处理组的生育期、农艺性状、经济性状和烤后烟叶的化学成分。[结果]随着株距的增大,团棵期之前不同处理组各生育期出现的时间没有明显差别,团棵期出现的时间会提前1~2 d。在不同生育期,烟草农艺性状随株距的变化而变化的趋势是不同的。[结论]随着株距的增大,烟草种植的密度减小,烟碱的含量则随着株距的加大而增高,烟草的单位产量在不断下降,但质量有所提高,当株距增加到一定程度时,烟草的质量也会随之下降,当株距为50cm时,烟草的产值最高。
[Objective] The experiment aimed to study the effects of different plant spacing on the plant structure, growth period, agronomic traits, tobacco yield and chemical composition after flue-cured tobacco leaves with fixed row spacing. [Method] Four treatments (40, 50, 60, 45 cm) were set up with a certain line spacing (120 cm). The growth, agronomic traits, economic characters and chemical compositions of cured tobacco leaves were analyzed and compared. [Result] With the increase of plant spacing, there was no significant difference in the emergence time of different treatment groups before the Tuanchu period, and the emergence time in Tuanchu period would be 1 ~ 2 days earlier. At different growth stages, the trend of tobacco agronomic traits changing with plant spacing is different. [Conclusion] With the increase of plant spacing, the density of tobacco planting decreased while the nicotine content increased with the increase of plant spacing. The unit yield of tobacco decreased continuously, but the quality increased. When the plant spacing increased to a certain level The quality of tobacco will also decline, when the plant spacing of 50cm, the highest output value of tobacco.