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

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.