湖南不同生态区烤烟主要化学成分比较

采集了湖南省3个生态区宁乡县、宁远县、桑植县的B2F、C3F、X2F三个等级烤烟样本54个，测定了烟叶总糖、还原糖、烟碱、总氮、钾、氯含量，比较了其生态区域差异。结果表明：总糖和还原糖含量表现为宁远县＞宁乡县＞桑植县，总植物碱含量表现为桑植县＞宁乡县＞宁远县，总氮含量表现为桑植县＞宁远县＞宁乡县，氯含量表现为宁远县＞宁乡县＞桑植县，钾含量表现为宁乡县＞宁远县＞桑植县；总糖、还原糖、总植物碱、氯、钾含量生态区间差异显著，主要表现为湘南烟区与湘西北烟区差异大，湘中烟区与湘南烟区化学成分较接近。

Comparison on Main Chemical Components of Flue-cured Tobacco Leaves Grown in Different Ecological Areas of Hunan Province

The difference of chemical components of flue-tobacco leaf were studies by detecting total sugar, reducing sugar, nicotine, total nitrogen, potassium and chlorine of 54 samples with 3 grades(B2F,C3F,X2F) from the typical tobacco-growing counties(Ningxiang,Ningyuan,Sangzhi) of Hunan Province. The results showed that: (1)The average concentration of total sugar, reducing sugar and chlorine in different counties was as follows Ningyuan＞Ningxiang＞Sangzhi; the total nicotine was as follows Sangzhi ＞Ningxiang＞Ningyuan; the total nitrogen was as follows Sangzhi＞ Ningyuan＞Ningxiang; the potassium was as follows Ningxiang＞Ningyuan＞Sangzhi.(2) The concentration difference of total sugar, reducing sugar, total nicotine, chlorine and potassium in different ecological areas were significant; the difference of chemical components of flue-tobacco leaf of Xiangnan and Xiangxibei was bigger than the difference of Xiangnan and Xiangzhong.