云南不同产区主栽烤烟品种烟叶物理特性的分析

为了客观反映云南不同产区和主栽烤烟品种烟叶物理特性的差异，采取品种定位试验与示范试验相结合的方式，研究了云南烤烟主产区和主栽烤烟品种烟叶的物理特性。结果表明，相同栽培条件下，不同烤烟品种的叶长、叶宽、长宽比和含梗率存在显著差异；不同生态产区各烤烟品种的含梗率、叶片密度和平衡含水率大多存在显著差异。云南大多数烟区4个主栽烤烟品种的叶长和叶片厚度的均值基本达到优质烟叶的范围，但叶宽和长宽比均值大多达不到优质烟叶的标准。不同烟区和不同烤烟品种的单叶重和单位叶面积质量均值大多高于国外烟叶。烟叶密度和平衡含水率在一定程度上可以反映同一等级不同产区和不同品种烟叶品质存在的差异。

Analysis of physical characteristics of tobacco leaves from different cultivars and different production areas in Yunnan

Physical characteristics of tobacco leaves from different production areas in Yunnan were analyzed by experimentation and demonstration trials in order to reflect differences.Results indicated that there were significant difference in leaf length,leaf width,ratio of length and width,midrib proportion of different cultivars under same cultivated condition.There were significant difference in midrib proportion,density and water proportion of the tobacco leaf in different cultivars and production areas.Mean va...