烟梗主要化学成分特征及其与巴豆醛释放量的关系

为明确烤烟烟梗化学成分特征及其与梗丝燃吸后巴豆醛释放量之间的关系，测定了国内烤烟主产区上部、中部和下部梗丝样本主要化学成分含量和巴豆醛释放量，分析了化学成分与巴豆醛释放量的相关关系。结果表明，烟梗化学成分中淀粉、总植物碱和总糖含量低于烟叶，纤维素、钾和果胶含量高于烟叶；不同产区间烟梗总糖、淀粉、钾、纤维素和半纤维素含量差异性达极显著水平，蛋白质、总植物碱以及巴豆醛释放量达到显著水平；不同部位间烟梗总植物碱、木质素、果胶含量以及巴豆醛释放量差异达极显著水平，蛋白质含量达到显著水平。烟梗主要化学成分与烟叶差异较大；产区和部位是影响烟梗化学成分和巴豆醛释放量的重要因素；梗丝巴豆醛释放量与烟梗总糖含量极显著正相关，与蛋白质含量显著正相关，与钾和纤维素含量显著负相关。

Analysis of Chemical Components in Tobacco Stem and Correlation with Crotonaldehyde

In order to find out the characteristics of chemical composition of tobacco stem and its relationship with the release of crotonaldehyde, the main chemical components in tobacco stem of 3 stalk positions (upper, middle and lower) from Chinese main tobacco growing areas and the release of crotonaldehyde were evaluated with correlation analysis. The results showed that the contents of starch, total alkaloid and total sugar in stem were lower than that in lamina. The contents of cellulose, potassium and pectin in stem were higher. The difference of the content of total sugar, starch, potassium, cellulose and hemicellulose among different growing areas was highly significant. The difference of the contents of the total alkaloid, lignin, pectin and the release of crotonaldehyde among different stalk positions was significant. The main chemical components in tobacco stem were obviously different from those in tobacco lamina. Growing area and stalk position were important factors that affect the chemical composition and release of crotonaldehyde. There was a significant positive correlation between the release of crotonaldehyde and the content of total sugar. The release of crotonaldehyde was negatively correlated with the contents of potassium and cellulose.