晒红烟烟碱积累规律及不同施肥量对烟碱的影响

Accumulation Rule of Nicotine in Sun-cured Red Tobacco and Effects of Different Fertilizer Application Amounts on Nicotine

[目的]探讨晒红烟烟碱积累规律及不同施肥量对烟碱的影响。[方法]以延晒5号为供试品种,硝酸磷、磷酸二铵与硫酸钾为供试肥料,研究不同施肥量对烟碱的影响。[结果]晒红烟烟碱积累量是从移栽后50 d开始迅速增加。叶、根部烟碱日积累量最高值均出现在移栽后60 d,茎部日积累量最高值是在移栽后70 d。烟碱以叶中分布最多,根次之,茎最少;烟碱在根、茎、叶中的比例,生育前期和后期无明显的变化。在相同的施肥水平条件下,烟碱的含量为上部叶>中部叶>下部叶。总糖含量为中部叶>上部叶>下部叶。在不同的施肥水平下,总糖随着施氮量的增加而含量减少,随着部位的上升烟碱含量增加。[结论]该研究为晒红烟的生产提供了科学依据。

[ Objective ] The aim was to discuss the accumulation rule of nicotine in sun-cured red tobacco and effects of different fertilizer ap- plication amount on nicotine. [ Method ] With Yanshai 5 as tested variety, phosphorus nitrate, diammonium phosphate and potassium sulfate as tested fertilizers, the effects of different fertilizer application amount on nicotine were studied. [ Result ] Nicotine in sun-cured red tobacco star- ted to accumulate rapidly since 50 d after transplanting. The highest value of nicotine daily accumulation amount in leaf and root all appeared on the 60th day after transplanting and that in stem appeared on the 70th day after transplanting. Nicotine in tobacco leaf was highest, that in stem was next and that in root was least, There was no obvious change on the proportion of nicotine in tobacco root, stem and leaf between ear- lier growing stage and late growing stage. Under the same condition of fertilization level, the nicotine content was upper leaf 〉 middle leaf 〉 lower leaf and the total sugar content was middle leaf 〉 upper leaf 〉 lower leaf. Under the different fertilization level, the total sugar content was decreased with the increment of nitrogen application amount and the nicotine content was increased with the rising of plant parts. [ Conclusion] The research provided the scientific basis for the production of sun-cured red tobacco.