摘要： 为了探明氮肥施用量对烤烟不同叶位烟叶糖含量的影响,采用2个氮肥处理,对不同叶位烟叶的总糖含量和还原糖进行测定.结果表明,A(97.5 kg/hm²)、B(112.5 kg/hm²)2个处理的总糖和还原糖含量都随着叶位降低呈现先升高后降低的趋势;从上二棚到腰叶,2个处理总糖和还原糖含量随着叶位的降低而显著升高,之后随着叶位的降低而显著降低.A、B 2个处理的两糖差则随着叶位降低先降低后升高,以上部叶最高,下部叶次之,中部叶最低.A处理不同叶位的总糖、还原糖含量和两糖差多高于B处理相同叶位的.由此可见,施氮量的增加在一定程度上降低了不同叶位烟叶总糖、还原糖含量和减小了两糖差.

关键词: 烤烟, 氮肥, 叶位, 总糖, 还原糖, 两糖差

Abstract: A nitrogen fertilizer experiment was conducted to measure total sugar content and reduced sugar content in different tobacco leaves in order to explore the impact of nitrogen fertilizer on the above mentioned parameters in different leaf position.The results showed that total sugar content and reduced sugar content in A treatment and B treatment were increased firstly and then decreased with the drop of leaf position.The total sugar content and reduced sugar content in A treatment and B treatment were increased significantly from leaf to cutters and those were decreased significantly from cutters to fly.The difference of two sugars between A treatment and B treatment was reduced firstly and then raised with the drop of leaf position.The difference of two sugars in upper leaf was highest,followed by lower leaf,and cutters was lowest.The total sugar content,reduced sugar content and difference of two sugars in A treatment most leaves position were higher than B treatment.So the conclusion was that total sugar,reduced sugar and difference of two sugars of different leaf position were lower under 112.5 kg/ha nitrogen fertilizer treatment than that of 97.5 kg/ha nitrogen fertilizer treatment.

Key words: Flue-cured, Nitrogen fertilizer, Leaf position, Total sugar, Reduced sugar, Difference of total sugar and reduced sugar

中图分类号: 

• S143.1