湘西烟叶还原糖含量及区域分布特征

Regional Distribution and Content Characteristic of Reducing Sugar of Flue-cured Tobacco in Xiangxi

为深入了解湘西烟叶还原糖含量区域特征,采用连续流动法测定了湘西主产烟区烟叶还原糖含量,研究了湘西烟叶还原糖含量在等级、品种、土壤类型、海拔和县域的分布特征。结果表明:湘西烟叶B2F、C3F、X2F等级的烟叶还原糖含量分别为21.92%、28.99%、28.80%,属烟叶糖含量较高烟区。不同等级烟叶还原糖含量为C3F>X2F>B2F,差异极显著。不同县之间烟叶还原糖含量差异极显著,不同品种、不同海拔间只有C3F、X2F等级烟叶还原糖含量存在差异,不同土壤类型间种植的烟叶还原糖含量差异不显著。烟叶还原糖含量空间分布有从东南向西、东北两个方向递增的分布趋势。

The reducing sugar content of flue-cured tobacco from main tobacco-growing areas in Xiangxi were determined by continuous flow method to study its regional distribution characteristic at grades, varieties, soil types, elevation and different counties. The results show that the mean of reducing sugar content in the flue-cured tobacco leaf of B2F, C3 F and X2F grade were 21.92% ,28.99 % ,28.80%, respectively, and belong to better-sugar tobaccoplanting areas. The sequence of reducing sugar content： C3F 〉 X2F 〉 B2F. There were extreme significance difference in the reducing sugar content of flue-cured tobacco among grades and among counties;and significance difference among varieties and among elevation in X2F and C3F grade;and not-significance difference among soil types. The reducing sugar content increased gradually from the low reducing sugar content areas of southeast to west and northeast orientation.