Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (5): 1163-1166.DOI: 10.16178/j.issn.0528-9017.20240013

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Effects of different topping measures on yield and quality of K326 in Dali tobacco-growing areas

YANG Dehai1(), MA Junjie1, PENG Xiaoci2, ZHAO Weijin1, XIE Yiyan1, YANG Yan1, FENG Canhu1, PENG Ren1, HUANG Wei3, XUE Bo4, WANG Yannan3, OUYANG Chengren5,*()   

  1. 1. Dali Cigarette Factory of Hongta Group, Dali 671000, Yunnan
    2. Shizong Branch of Qujing Company, Yunnan Tobacco Company, Shizong 655000, Yunnan
    3. Yongping Branch of Dali Company, Yunnan Tobacco Company, Yongping 671000, Yunnan
    4. Yangbi Branch of of Dali Company, Yunnan Tobacco Company, Dali 671000, Yunnan
    5. College of Tobacco, Yunnan Agricultural University, Kunming 650000, Yunnan
  • Received:2024-01-04 Online:2025-05-11 Published:2025-05-20

Abstract:

To determine the suitable topping measures for K326 in Dali tobacco-growing areas, a split-plot experiment was conducted to compare the effects of topping at early flowering and full flowering stages with 18, 20, and 22 leaves retained on the yield and quality of K326. The results showed that topping at the early flowering stage generally outperformed topping at the full flowering stage in terms of agronomic traits, economic traits, and internal chemical quality. Topping at the early flowering stage with 22 leaves retained resulted in the best growth and highest yield of flue-cured tobacco, but the output value, average price, proportion of medium-grade tobacco, proportion of high-grade tobacco, and internal chemical composition were slightly inferior. Topping at the early flowering stage with 20 leaves retained achieved higher economic benefits and the most balanced internal chemical composition among all treatments. Based on comprehensive evaluation of various indicators, topping at the early flowering stage with 20 leaves retained is the most suitable practice for cultivating K326 in Dali tobacco-growing areas.

Key words: flue-cured tobacco, topping time, number of leaves retained, yield and quality

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