摘要： 通过外源葡萄糖调节营养液的碳氮比, 研究了不同碳氮比对烤烟生理生化特性及化学成分的影响, 结果表明, 和对照相比, 不同碳氮比处理均能提高叶片叶绿素的含量; 碳氮比为0.5时, 叶片硝酸还原酶的活性最强; 蔗糖转化酶活性和淀粉酶活性(碳氮比为0.75处理除外), 以碳氮比为0.5的处理最高; 随碳氮比的升高各处理氮、钾含量呈现先升后降的趋势, 磷含量则一直升高; 各处理烟叶总糖含量都较对照高, 其中以碳氮比为0.4, 0.5, 0.75处理效果较明显; 还原糖含量表现为: 碳氮比0.5> 碳氮比0.4, 0.75> 碳氮比0.2, 1.5。

关键词: 外源糖, 碳氮比, 烤烟, 生理生化特性, 化学成分

Abstract: This paper studied the effects of dagferern C/N ratio adjusted by glucose on the physiological and biocherngical characteristics and chemical components of flue-cured tobacco using wateagculture method. The results showed that all the C/N ratio treatments could increase the content of leaf chlorophyll a and chlorophyll b compared with CIA. The activity of nitrate reductase increased with the increase of C/ N ratio when C/N was under 0.5, but it was restrained when C/ N exceeded 0.5. The highest activities of leaf invertase and amylase were from the 0.5 C/ N treatment. With the increase of C/ N ratio, the N and Iag contents of flue-cured tobacco increased and then decreased, but P content increased all the way. The total sugar content of tobacco was all higher in C/N ratio treatments than that in CIA. The reduced sugar content was the highest for C/N treatment 0.5, follaved by 0.4 and 0.75, then 0.2 and 1.5.

Key words: Sugar, C/ N ratio, Flue cured tobacco, Physiological and biochanical characteristics, Chemical canponents

中图分类号: 

• S572.01