Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (23): 52-60.doi: 10.11924/j.issn.1000-6850.casb2020-0654

Special Issue: 园艺 烟草种植与生产

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Effects of N, P, K Dosage and Distribution of Basic and Topdressing Nutrients on Yield and Quality of Tobacco Leaves

Yu Yaoying1(), Wang Mingfu1, He Jixian2, Zhang Qili2, Chen Liping2, Jiang Hao3, Gu Huizhan2()   

  1. 1Plant Protection Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066
    2Guangyuan Tobacco Company, Guangyuan Sichuan 628000
    3Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041
  • Received:2020-11-12 Revised:2021-01-28 Online:2021-08-15 Published:2021-08-26
  • Contact: Gu Huizhan E-mail:kellyyyzsj@163.com;39564259@qq.com

Abstract:

To improve the quality of tobacco leaves and clarify a nutritionally balanced fertilization system in flue-cured tobacco on lime purple soil, in 2018-2019, a field orthogonal experiment was carried out to study the effects of different dosage of NPK and the different proportion of NK on the agronomic characters, yield and chemical index of the tobacco. The results showed that: (1) NPK application rate had significant effect on agronomic traits of flue-cured tobacco, N had significant effect on SPAD and chemical composition, N and P had significant effect on yield, and the yield was positively correlated with N application rate; (2) N2P3K2 (97.5, 150 and 315 kg/hm2) was the best fertilization combination for Guangyuan flue-cured tobacco; (3) the application of nitrogen fertilizer forward and potassium fertilizer backward was more conducive to improving the internal quality of tobacco leaves. Balanced fertilization system of flue-cured tobacco cultivation in Guangyuan is NPK application rate of 97.5, 150 and 315 kg/hm2, respectively, and the nutrient allocation ratio of NK base fertilizer and top dressing fertilizer is N base: topdressing = 7:3, K base: topdressing = 3:7.

Key words: flue-cured tobacco, base fertilizer, topdressing, nutrient distribution ratio, yield and quality of tobacco leaves

CLC Number: