Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (6): 1462-1468.DOI: 10.16178/j.issn.0528-9017.20250156

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Study on cultivation techniques for one⁃time harvest of upper leaves of tobacco variety NX212 planted in purple soil

SHEN Si1(), ZHAO Weicai2,3, SUN Huiju1, DOU Yuqing4, WANG Jun2,3, WANG Xuebo2,3, XIE Xiaobin1, ZONG Zhaohui2,3()   

  1. 1.Guangdong China Tobacco Industry Co. ,Ltd. ,Guangzhou 510510,Guangdong
    2.Guangdong Tobacco Science Research Institute,Shaoguan 512029,Guangdong
    3.Guangdong Tobacco Shaoguan Co. ,Ltd. ,Shaoguan 512026,Guangdong
    4.Tobacco Research Institute,Chinese Academy of Agricultural Sciences,Qingdao 266101,Shandong
  • Received:2025-03-05 Online:2026-06-11 Published:2026-06-12
  • Contact: ZONG Zhaohui

Abstract:

To explore the optimal cultivation measures for one-time harvest of upper leaves of tobacco variety NX212,this study conducted a three-factor three-level orthogonal experiment on leaf retention number,nitrogen application rate,and planting density in purple soil in Nanxiong City,Guangdong Province. The results demonstrated that planting density had the biggest impact on agronomic traits and appearance quality. The planting density of 1 000 plants per 667 m2 achieved optimal agronomic traits and appearance quality of tobacco leaves. Nitrogen application rate showed the strongest influence on chemical composition,with nicotine content,potassium content,and nitrogen-to-nicotine ratio reaching peak values at a nitrogen application rate of 180 kg·hm-2. Leaf retention number had the biggest impact on sensory quality. With an increase in leaf retention number,the scores for tobacco aroma,aftertaste,off-flavors,irritancy,and overall sensory quality evaluation exhibited a trend of initial decline followed by improvement. The optimal sensory quality was achieved when the leaf retention number reached 19. In summary,the three factors influencing the comprehensive quality of tobacco leaves followed this order of importance:nitrogen application rate> leaf retention number> planting density. Furthermore,based on range analysis,the optimal cultivation measures for one-time harvest of upper leaves of tobacco variety NX212 grown in purple soil in Nanxiong,Shaoguan include:planting 1 000 plants per 667 m2,applying 180 kg·hm-2 of nitrogen,and retaining 19 leaves per plant. This study provides crucial support for developing integrated cultivation strategies for one-time harvest in Guangdong's flue-cured tobacco production areas.

Key words: one-time harvest, tobacco variety NX212, planting density, leaf retention number, nitrogen application rate

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