不同海拔烤后烟叶物理特性规律的研究

Rule of Physical Characteristics of Flue-cured Tobacco Leaves from Different Altitudes

以云烟87为试验品种,对毕节市高(2 100 m)、中(1 430 m)、低(840 m)3个典型海拔烤后烟叶的物理特性进行了研究。结果表明,高海拔下烤烟叶片填充值、含梗率、宽度与烟叶着生部位呈负相关,单叶重与烟叶着生部位呈正相关;中海拔下烤烟叶片宽度与烟叶着生部位呈负相关,填充值、含梗率、单叶重随烟叶着生部位升高呈现先升高后降低的变化规律;低海拔下烤烟叶片单叶重与烟叶着生部位呈正相关,填充值、含梗率、叶片宽度与烟叶着生部位呈先升高后降低的趋势。不同海拔下烤烟叶片的拉力、单位叶面积质量、叶片厚度、叶片长度的变化规律一致,而单叶重、叶片宽度、含梗率、填充值变化规律不完全相同。不同着生部位烤烟叶片物理特性的变化幅度在高海拔和中海拔下较大,在低海拔下变化幅度较小,并表现出明显差异。

Yunyan87 was used as test variety to study the physical characteristics of flue-cured tobacco leaves from three typical altitudes in Bijie city,low altitude（840 m）,middle altitude（1 430 m）,high altitude（2 100 m）.The results showed that at high altitude,tobacco leaf position is negatively correlated with filling value,stalk proportion and leaf width,but it is positively correlated with single leaf weight;at middle altitude,tobacco leaf position is negatively correlated with leaf width,and filling value,stalk proportion and single leaf weight increase first and then decrease with increasing tobacco leaf position;at low altitude,tobacco leaf position is positively correlated with single leaf weight,and filling value,stalk proportion and leaf width increase first and then decrease with increasing tobacco leaf position.At different altitudes,tobacco leaf tension,leaf mass per unit area,leaf thickness and leaf length variant the same,but single leaf weight,leaf width,stalk proportion and filling value variant a little different.The physical characteristics of the flue-cured tobacco leaves from different positions changes relatively great at high altitude and middle altitude,and it changes small at the low altitude,moreover,there is a significant differences between them.