不同株距对烟叶等级结构的影响

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1～2d.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.

Effect of Different Spacing on Structure of Flue-cure Tobacco Leaf Grade

Objective] This study was conducted to investigate the effects of different plant spacing on tobacco grade structure,growth stages,agronomic traits,yield and chemical composition under fixed row spacing.Method] Under fixed row spacing (120 cm),4 treatments were designed (40,50,60 and 45 cm).The growth stages,agronomic traits,economic traits and chemical composition of flue-cured tobacco leaves were compared and analyzed.Resuit] with the increase of plant spacing,there were no significant differences in the emergence time of growth stages betwean different treatment groups before resettling stage,and the resettling stage appeared 1-2 d in advance.At different tobacco growth stages,the changing trends of tobacco agronomic traits with the change of plant spacing were different.Conclusion] With the increase of plant spacing,the planting density of tobacco decreased,and the nicotine content increased;and the yield of tobacco decreased continuously,while the quality was improved,but when the plant spacing was improved to certain degree,the quality of tobacco also decreased,and at the plant spacing of 50 cm,the output value of tobacco was the highest.