Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (6): 1469-1473.DOI: 10.16178/j.issn.0528-9017.20231086

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Effect of nitrogen application rate and planting density on seed oil yield and fatty acid composition of flue⁃cured tobacco Dashubazhiba

SONG Biqing1(), YANG Xiaodong1(), LI Sujuan2, CHEN Yunsong1, QIAO Yu1, LUO Xiu1, SONG Wei1   

  1. 1.Yuxi Zhongyan Seed Co. ,Ltd. ,Yuxi 653100,Yunnan
    2.State Key Laboratory for Quality and Safety of Agro?Products,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,Zhejiang
  • Received:2023-11-08 Online:2026-06-11 Published:2026-06-12
  • Contact: YANG Xiaodong

Abstract:

This study aimed to investigate the effects of nitrogen application rate and planting density on seed oil yield and fatty acid composition of flue-cured tobacco Dashubazhiba,providing cultivation technical references for reducing the cost of its seed oil. A split-plot design was adopted,and the agronomic traits,seed yield traits,seed oil yield,and fatty acid composition of the seeds were compared under three nitrogen application rates(90.0,135.0,180.0 kg·hm-2)and three planting densities(18 180,22 230,27 780 plants per hectare). The results showed that the agronomic traits of Dashubazhiba were affected by nitrogen application rate,while seed yield and seed oil yield increased with increasing nitrogen application rate and planting density. The fatty acid composition of seed oil remained consistent across different treatments,but their contents showed slight variations. To obtain high-yield and high-quality seed oil of Dashubazhiba,the optimal nitrogen application rate was 180.0 kg·hm-2 and planting density was 27 780 plants per hectare. Under these conditions,seed yield reached 2 325.15 kg·hm-2,seed oil yield reached 962.60 kg·hm-2,and the contents of total fatty acids,monounsaturated fatty acids,polyunsaturated fatty acids,linoleic acid,and oleic acid were all at relatively high levels.

Key words: seed oil yield, nitrogen application rate, planting density, fatty acid, tobacco

CLC Number: