湘西州烟叶物理特性分析

Analysis on Physical Characteristics of Flue-cured Tobacco Leaves in Xiangxi Autonomous Prefecture

为明确湘西州烟叶物理特性的区域特征,以C3F等级烟叶为材料,分析了湘西州烟区烤烟主要物理特性在不同品种、土壤类型、海拔和县域间的差异。结果表明:湘西州烤烟开片度小,单叶重偏高,叶片厚度薄,叶质重轻,平衡含水率高,含梗率适宜。含梗率和平衡含水率的变异系数较小。开片度、单叶重、平衡含水率在品种、土壤类型、海拔高度间差异不显著;含梗率、叶片厚度、叶质重在品种和海拔高度间差异不显著,但土壤类型间差异显著;开片度、含梗率、叶片厚度、叶质重县区间差异显著。

The differences in major physical characteristics of flue -cured tobacco among different varieties, soil types, alti- tudes and counties were analyzed with C3F grade tobacco leaves as materials in order to ascertain the regional feature of major physical characteristics of flue - cured tobacco in Xiangxi Autonomous Prefecture. The results showed that the prop- erties of tobacco leaves in Xiangxi were smaller length with leaf width proportion, higher weight per leaf, thinner thickness of leaf,lighter weight per unit leaf area, higher balance water ratio and suitable stem ratio. The coefficients of variance of balance water ratio and stem ratio were smaller. The differences in length with leaf width proportion, weight per leaf and balance water ratio were not significant among different varieties, soil types and altitudes. The differences in stem ratio, thickness of leaf and weight per unit leaf area were not significant among varieties and altitudes, respectively, while there existed significant difference among soil types. The differences in length with leaf width proportion, stem ratio, thickness of leaf and weight per unit leaf area were significant among different counties.