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Acta Prataculturae Sinica ›› 2013, Vol. 22 ›› Issue (6): 60-67.DOI: 10.11686/cyxb20130608

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Effects of different nitrogen fertilizer types and humic acid (HA) on chemical composition, yield and quality of flue-cured tobacco traits in typical ecological zones of Shaanxi province

ZHANG Xi-feng1,3, ZHANG Li-xin1, GAO Mei1, WEI Cheng-cai2, MA Ying-ming2, WANG Ping-ping4, GENG Wei5   

  1. 1.College of Life Sciences, Northwest A & F University, Yangling 712100, China;
    2.Tobacco Institute of Shaanxi Province, Xi’an 710000, China;
    3.Longxian County Tobacco Company of Shaanxi Province, Longxian 721200, China;
    4.Luonan County Tobacco Company of Shaanxi Province, Luonan 726100, China; 5.Xunyang County Tobacco Company of Shaanxi Province, Xunyang 725700, China
  • Online:2013-12-20 Published:2013-12-20

Abstract: To provide a theoretical and practical basis for cultivation of flue-cured tobacco with high yield and better quality, a field experiment was conducted in three different ecological growing-tobacco regions in Shaanxi province. The effects of different types of nitrogen (N) fertilizers and combinations with humic acid (HA) on chemical composition, yield and quality characters of flue-cured tobacco were investigated. Both N fertilizers and combinations with HA increased contents of nicotine and N, but decreased reducing sugar content. Their effects on contents of potassium (K) and chlorine (Cl) were varied due to different ecological conditions. The combined application of N and HA more effectively modulated the content of chemistry components than single N treatment. Yield of tobacco leaves followed the order of Longxian>Luonan>Xunyang, however, the output value showed that Longxian was similar to Xunyang, and both of them were less than Luonan. Both N fertilizers and combinations with HA enhanced yield and quality of flue-cured tobacco in three ecological regions, and their positive effects were different in the three regions. Suitable N fertilizer forms were amide-N in Longxian, but combined-N with ratio of amide∶ammonium∶nitrate 1∶1∶1 in Luonan, and nitrate-N in Xunyang. The effects of N fertilizers combined with HA in Longxian and Luonan were greater than that of a single N application, and similar effects were obtained in Xunyang. It is suggested that different suitable N fertilizers should be applied in the various ecological regions, and N fertilizers combined with HA could more effectively promote growth and development, coordinated chemical components of tobacco leaf, and improved yield and quality of flue-cured tobacco than single N fertilizer in these ecological growing-tobacco regions.

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