摘要： 2001-2002年,在河南农业大学试验站采用漂浮育苗方式研究了不同尿素态氮水平对烤烟烟苗营养生长和生理特性的影响。结果表明,尿素态氮为15%,对烤烟漂浮育苗营养生长和生理特性无不良影响。与对照相比,当尿素态氮为75%时,烟苗的生长受到明显抑制,叶片的光合特性和NR活性降低,根系吸收能力下降。

关键词: 烤烟, 漂浮育苗, 尿素态氮, 生理特性

Abstract: The study was conducted on effects of different urea2nitrogen levels on nutritional growth and physiologicalcharacteristicsof tobacco seedlings in the floating system,in the experimental station of Henan Agricultural Universityduring 2001 - 2002. The results showed that it had no bad effects on nutritional growth and physiological characteristics oftobacco seedlings in the floating system for the treatment of 15 % urea2nitrogen. When the contents of urea2nitrogen were75 %,tobacco seedlings growth was obviously restrained,photosynthesis and the NR activity reduced,the root absorbing a2bility dropped than CK.

Key words: Flue2cured tobacco, Floating system, Urea2nitrogen level, Physiological characteristics

中图分类号: 

• S572.01