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This article in AJ

  1. Vol. 76 No. 6, p. 917-921
     
    Received: Sept 19, 1983
    Published: Nov, 1984


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doi:10.2134/agronj1984.00021962007600060013x

Growth Characteristics of Oriental Tobacco as Affected by Cultivar and Type1

  1. P. C. Lolas,
  2. A. Galopoulos and
  3. A. G. Sficas2

Abstract

Abstract

Oriental tobacco (Nicotiana tabacum L.) grown in Greece is classified commercially into three types: a) Aromatic, b) Neutral, and c) Taste. Although growth characteristics of flue-cured and burley tobacco have been extensively studied, very little work has been done on oriental tobacco. Two cultivars of each of the three oriental types were grown in field plots replicated three times for 3 years. Data obtained at 0, 20, 30, 40, 60, 85, and 105 days after transplanting were: dry weights of roots, stalks, leaves, and inflorescences; plant heights; number of harvestable leaves; relative growth rate; and absolute growth rate. The types and cultivars differed significantly in their growth rates, and patterns after 60 days from transplanting. Generally, cultivars within the same type were not significantly different. All of the measured growth characteristics followed the sigmoid growth curve with the period of rapid growth being from 30 to 60 days after transplanting. Aromatic cultivars were fast growing, early maturing, and low in total dry matter. Taste cultivars, on the other hand, were slow growing, late maturing, and high in total dry matter. Neutral cultivars were intermediate. In all three types, leaves comprised about 4096, stems 25%, roots 18%, and inflorescences 17% of the total plant dry matter. It is concluded that the critical growth period for oriental tobacco cultivars and types is, as for flue-cured and burley, 30 to 60 days after tansplanting.

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