采用统计分析方法,对湖北烟区18个植烟县的2005-2009年共计234个初烤烟叶B2F、C3F、X2F样品的主要化学成分进行了稳定性分析.结果表明:(1)湖北烤烟化学成分平均值基本都在优质烟的适宜值范围内,总糖、还原糖、总氮的变异较小,氯、钾氯比、糖碱比的变异较大.(2)湖北烤烟主要化学成分变异性在各年度表现不同,各年份各部位等级烟叶主要化学成分含量变异不同.总体来看,年度内氯、两糖差的变异较大,总氮、还原糖、总糖的变化较小.(3)湖北烤烟B2F等级年度间总糖、总氮、钾、氮碱比、糖碱比达到极显著差异；烟碱、钾氯比达到显著差异.C3F等级年度间总糖、总氮、氮碱比、糖碱比、钾氯比达到极显著差异；烟碱、氯达到显著差异.中上部烟叶的烟碱呈下降趋势,钾含量呈上升趋势.X2F等级年度间总糖、总氮、钾、糖碱比、钾氯比达到极显著差异；烟碱、氯、氮碱比达到显著差异.%Stability of chemical component contents between 2005 and 2009 was statistically analyzed by 234 of flue-cured tobacco samples with grades of B2F, C3F and X2F from Hubei province. The results showed that, in average, chemical components of flue-cured tobacco from Hubei province were almost in normal range of high quality flue-cured tobacco, which indicated that the flue-cured tobacco in Hubei had appropriate content of chemical components, and had high quality. The variation coefficients of total sugar, reducing sugar and total nitrogen were small and stable. The variation coefficients of chlorine, the ratio of potassium to chlorine and the ratio of total sugar to nicotine were high and unstable. There existed extensive variation among chemical components of different grades in different years. Overall, the variation coefficients of chlorine and the difference between total sugar and reducing sugar were high. Highly significant differences with grades of B2F between years were found for contents of total sugar, total nitrogen, potassium, the ratio of total nitrogen to nicotine and the ratio of total sugar to nicotine, while significant difference for nicotine and the ratio of potassium to chlorine. Highly significant differences with grades of C3F between years were found for content of total sugar, total nitrogen, the ratio of total nitrogen to nicotine, the ratio of total sugar to nicotine and the ratio of potassium to chlorine, while significant difference for nicotine and chlorine. From 2005 to 2009, the content of nicotine with grades of B2F, and C3F had increasing trend, while that of potassium has decreasing trend. Highly significant differences with grades of X2F between years were found for contents of total sugar, total nitrogen, potassium, the ratio of total sugar to nicotine and the ratio of potassium to chlorine, while significant difference for nicotine, chlorine and the ratio of total nitrogen to nicotine.
展开▼
