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１９９２～１９９３年在河南农业大学采用盆栽方法对芳香型和吃味型香料烟不同叶位和成熟度叶片的植物学特性进行了研究。结果表明，在相同营养条件下，芳香型品种Ｂａｓｍａ的单株叶片数较吃味型品种Ｓａｍｓｕｎ的少。Ｂａｓｍａ品种叶片的腺毛密度、单位面积分泌细胞数、气孔密度和气孔宽长比均随叶位的升高而增大。Ｂａｓｍａ和Ｓａｍｓｕｎ品种叶片的干鲜比和单位叶面积重随叶位的升高而增大，不同成熟度则表现为适熟叶最高，其次为过熟和欠熟。Ｂａｓｍａ品种叶片的干鲜比和单位叶面积重分别较Ｓａｍｓｕｎ提高２６．２４％和３０．１０％，说明Ｂａｓｍａ品种叶片内含物充实，为该品种的浓郁芳香奠定了基础。
The botanical characteristics of leaves at different leaf positions and maturity of aromatic and edible flavored tobacco were studied by potted method in Henan Agricultural University from 1992 to 1993. The results showed that, under the same nutrient conditions, the number of leaves per plant of the aromatic variety Basma was less than that of the taste-sensitive variety Samsun. The glandular density, the number of secretory cells per unit area, stomatal density and stomatal width of Basma cultivars increased with leaf position. Dry matter ratio and unit leaf area of Basma and Samsun cultivars increased with the increase of leaf position. The maturity of different cultivars was the highest, followed by overmature and undermature. Dry weight and unit leaf area weight of Basma cultivars were increased by 26.24% and 30.10%, respectively, compared with that of Samsun, which indicated that the contents of Basma cultivars were abundant and laid the foundation for the rich aroma of this cultivar.