安徽农业科学2018，Vol.46Issue(9)：45-48,93,5.
赤霉素(GA3)喷施时期对烤烟上部叶生长及产质量的影响
Effects of Gibberellin(GA3) Spraying Time on the Growth,Yield and Quality of Tobacco Upper Leaves
摘要
Abstract
[Objective] To study the effects of spraying times of gibberellin(GA3) on the growth of tobacco upper leaves,and to further perfect the key regulation technology for tobacco upper leaves in field.[Method] Field test was carried out.A total of eight spraying treatments were de-signed,including clean water (CK),0,1,2,3,4,6,8 and 10 days after topping.The changes of agronomic characters,economic characters and chemical components of upper leaves were analyzed.[Result] Compared with the controls,spraying GA3from 0 to 3 d after topping could effec-tively promote the leaf expansion of tobacco upper leaves.Leaf area and leaf weight firstly enhanced and then reduced as the spraying time pro-longed.The increasing rate of each leaves reached the maximum at 2-3 d after topping.Spraying GA3on 2 d after topping,the increasing rates of average leaf area and leaf weight of upper 1-6 leaves were 24.8% and 24.4%,respectively.And the proportion and yield of first-class tobacco, the total yield and the output value enhanced by 2.7%,11.49%,7.24% and 11.27%,respectively;the decreasing rate of nicotine and the in-creasing rate of total potassium were the maximum,and the chemical components were the most coordinate.[Conclusion] Spraying GA3on 2 d af-ter topping was the most beneficial to promote the expansion,yield,and quality of tobacco upper leaves.Based on the weather conditions,spraying GA3from 0 to 3 d after topping could effectively avoid the influence of rainfall,which was of practical significance to effective regulating the to-bacco upper leaves.关键词
烤烟/上部叶/开片/赤霉素/喷施时期Key words
Flue-cured tobacco/Upper leaves/Expansion/Gibberellin(GA3)/Spraying time分类
农业科技引用本文复制引用
卜令铎,计思贵,李江舟,张立猛,田云伟,罗永寿..赤霉素(GA3)喷施时期对烤烟上部叶生长及产质量的影响[J].安徽农业科学,2018,46(9):45-48,93,5.基金项目
云南省烟草公司科技项目"玉溪植烟土壤养分变化及施肥对策研究与应用"(2015YN13). （2015YN13）
