白肋烟生育过程中矿质元素和烟碱含量动态变化

Dynamic change in mineral elements and nicotine content of burley tobacco during plant growth and development

  • 摘要: 以四川白肋烟“达白1号”为材料, 对不同海拔高度(700 m和1 200 m)烟株生长期间矿质元素和烟碱含量的变化动态进行分析。结果表明: 烟株打顶前随生育进程的推进叶片含N量逐渐增加, 打顶后显著下降;P含量在整个生育期比较稳定;K含量随生育期的延长逐渐降低且打顶后显著降低。叶片中微量元素含量依次为Ca>Mg>Mn>Fe>Zn>B>Cu, 其中Ca、Mg、Mn、Zn含量随生育进程一般表现先增高再下降趋势, Fe和Cu含量表现持续下降, B含量比较稳定。高海拔烟叶N、Ca、Mg含量低于低海拔, P、K、Fe、Mn含量高于低海拔, 其他元素无明显趋势。各海拔烟株Ca、Mg、B含量偏低, 微量元素Cu、Fe丰富。低海拔烟株烟碱含量高于高海拔且每烟株上部叶烟碱含量高于中部叶, 打顶后各部位烟碱含量上升速度明显加快。

     

    Abstract: Burley tobacco variety “Dabai 1” was used to investigate dynamic changes in mineral elements and nicotine content of tobacco during growth and development at different altitudes. The results show that N content increases before topping, while it decreases after topping. P content remains stable during the whole growth period. K content decreases with growth, but rapidly decreases after topping. The content of micro-elements in tobacco is in the following order: Ca > Mg > Mn > Fe > Zn > B > Cu. Ca, Mg, Mn and Zn increase at early growth stages, and then decrease. Fe and Cu steadily decrease, while B remains stable. N, Ca and Mg are lower in tobacco cultivated in high altitudes than that in low altitude. P, K, Fe and Mn are higher in high altitude tobacco than in low altitude tobacco. All the other elements remain unchanged. Ca, Mg and B are low irrespective of altitude, while Cu and Fe are abundant. Nicotine is higher in low altitude tobacco than that in high altitude tobacco, higher in top leaves than in middle leaves, and increases significantly after topping

     

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