不同施氮水平和打顶方式对烤烟PVH1452烟叶产质量的影响

目的]探索在楚雄烟区特定的生态环境条件下,烤烟PVH1452适宜的施氮水平和打顶方式.方法]采用裂区试验设计.以施氮量为主处理,分别为75、105 kg/hm2两个水平;打顶方式为副处理,分别为扣心打顶和初花打顶两个水平.结果]75、105 kg/hm2两个施氮水平对烤烟PVH1452的农艺性状、产质量和外观质量、化学成分无明显影响.与初花打顶比较,扣心打顶株高明显降低,中上部叶长宽增大明显,初烤烟叶产量和质量明显提高,上部叶外观质量和化学成分更为适宜.结论]该研究可为楚雄烟区栽培管理中进一步改善烟叶品质提供技术依据.

Effects of Different Nitrogen Levels and Topping Methods on Yield and Quality of PVH1452

Objective] The aim was to explore the suitable nitrogen level and topping method for flue-cured tobacco PVH1452 in the specific environment conditions of Chuxiong tobacco area.Method] The split plot design was used.The main treatment was nitrogen application amount,two levels were 75 and 105 kg/hm2 respectively; the vice treatment was topping method,two levels were bud-topping and topping in early flower respectively.Result] There was no significant effects on agronomic traits,yield and quality,appearance quality,chemical properties of flue-cured tobacco PVH1452 between 5 kg/hm2 and 105 kg/hm2.Comparing to topping in early flower,the bud-topping＇ s plant height decreased significantly,length and width of upper leaf increased significantly,yield and quality improved significantly,and appearance quality and chemical composition of upper leaves was more suitable.Conclusion] The study provides a technical basis for deeply improving flue-cured tobacco leaves quality during cultivation and management in Chuxiong tobacco area.