Effects of Topping Time and Method on Economic Traits and Quality of Flue-cured Tobacco

WUWenxin, LISijun, TANZhipeng, ZONGYi, HEMingyu, PANFeilong, BIYiming, JIANGZhimin, CHENTao, XIABing, CHENGMingzhu, DENGXiaohua

Journal of Agriculture ›› 2024, Vol. 14 ›› Issue (8) : 9-15.

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Abbreviation (ISO4): Journal of Agriculture      Editor in chief: Shiyan QIAO

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Journal of Agriculture ›› 2024, Vol. 14 ›› Issue (8) : 9-15. DOI: 10.11923/j.issn.2095-4050.cjas2023-0154

Effects of Topping Time and Method on Economic Traits and Quality of Flue-cured Tobacco

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Abstract

In order to clarify the effects of topping time and topping method on the yield and quality of flue-cured tobacco, a field experiment was carried out in Guiyang, Chenzhou. The experiment was the two-factor split-plot test, and set C1 (topping at budding), C2 (topping at the opening of the central flower), C3 (topping at the opening of the full flower) and D1 (removing the flower without young leaves), D2 (removing the top adjacent 2 young leaves on the flower), D3 (removing the top 4 adjacent young leaves on the flower). The effects of different treatments on the economic traits, physical characteristics, chemical composition and sensory quality of flue-cured tobacco ‘Yunyan 87’ were analyzed. The results showed that with the delay of topping time, the proportion of superior tobacco, average price, yield, output value and smoking quality of flue-cured tobacco increased first and then decreased. The length, thickness and leaf area quality of upper leaves increased, and the contents of total nitrogen and nicotine increased. With the increase of young leaves removed by topping, the proportion of superior leaves increased first and then decreased, while the output value decreased first and then increased, and the length, thickness and leaf area quality of upper, middle and lower leaves increased, the leaf area index of middle leaves increased, and the contents of nicotine, total sugar and reducing sugar increased. Under the interaction of topping time and topping method, the economic traits of the treatment of topping without removing young leaves when the central flower was open were the best, the physical characteristics of the treatment of removing the top adjacent 4 young leaves on the flower when the bud was open were the best, and the sensory quality of the treatment of removing the top adjacent 2 young leaves on the flower when the central flower was open was the best. Therefore, it is more than suitable for ‘Yunyan 87’ to remove the top adjacent 2 young leaves on the flower when the central flower is open.

Key words

flue-cured tobacco / topping time / topping method / economic traits / quality of tobacco leaves

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WU Wenxin , LI Sijun , TAN Zhipeng , et al . Effects of Topping Time and Method on Economic Traits and Quality of Flue-cured Tobacco[J]. Journal of Agriculture. 2024, 14(8): 9-15 https://doi.org/10.11923/j.issn.2095-4050.cjas2023-0154

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为了提高烤烟品种K326上部叶的可用性,以常规打顶为对照,设置打叶留茎、打叶留花、打叶留花+抑芽剂处理,研究了顶端调控对K326烟叶化学成分、部位结构、经济性状和评吸质量等的影响。结果表明:与常规打顶相比,打叶留花、打叶留茎、打叶留花+抑芽剂处理烤后烟叶产量和产值稍有下降,均价分别提高4.41%、2.94%、1.23%,上等烟比例提高4.80、-2.20、-5.20个百分点,上部叶比例分别下降4.30、8.30、0.70个百分点,中部烟比例分别提高4.50、2.30、-3.30个百分点,上部叶烟碱含量分别下降33.63%、20.49%、25.74%,对中、上部叶均有明显的增糖降碱作用,能够改善上部叶评吸质量,使上部叶焦甜感风格突出,香气量足,杂气较少,烟气细腻。综合分析,以打叶留花处理效果较好。
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