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在湖南省桂阳烟区选择K326、云烟87、YZ206-9、湘烟3号4个烤烟品种,测定它们的化学成分和中性致香物质含量。结果显示:云烟87的总糖、还原糖和淀粉含量最高(30.26%、28.11%、4.74%),K326的烟碱含量(3.00%)最高,湘烟3号的总氮最高(2.16%),YZ206-9的石油醚提取物最高(5.46%)。4个烤烟品种烟叶除总糖、还原糖和氯含量均超出优质烤烟标准范围,其他化学成分含量均符合优质烟叶的标准。氮碱比和糖碱比也在优质烟叶范围,但钾氯比低于优质烟叶的标准。品种间烟叶的中性致香物质的种类一致,但含量差异显著。云烟87的中性致香物质总量以及大部分质体色素降解产物、美拉德反应产物、苯丙氨酸类降解产物含量都最高,显著高于其他品种。K326的类西柏烷类产物含量最高,显著高于云烟87和湘烟3号。湘烟3号与K326大部分美拉德反应产物和苯丙氨酸类降解产物含量相近,差异不显著。YZ206-9美拉德反应产物和苯丙氨酸类降解产物含量普遍低于其他品种。不同烤烟品种的化学成分和中性致香物质所占比例不同,含量也有较大差异。
Four flue-cured tobacco cultivars, K326, Yunyan87, YZ206-9 and Xiangyan3, were selected in Guiyang tobacco-growing areas of Hunan Province to determine their chemical compositions and neutral aroma components. The results showed that the content of total sugar, reducing sugar and starch in Yunyan 87 was the highest (30.26%, 28.11%, 4.74%), the highest in nicotine (3.00%) in K326, the highest in Xiangfan No.3 (2.16%), YZ206-9 the highest petroleum ether extract (5.46%). Four flue-cured tobacco varieties in addition to the total sugar, reducing sugar and chlorine content are beyond the standard range of high-quality flue-cured tobacco, other chemical composition content are in line with the standards of quality tobacco. The ratio of nicotine to base and the ratio of sugar to base were also in the range of good quality tobacco, but the K / C ratio was lower than the standard of good quality tobacco. The varieties of neutral aroma of tobacco leaves the same species, but the content was significantly different. The content of neutral aroma compounds, the majority of protoplast degradation products, Maillard reaction products and phenylalanine degradation products of Yunyan 87 were the highest, significantly higher than other varieties. The content of cembradient of K326 was the highest, significantly higher than that of Yunyan87 and Xiangfan3. Most of the Maillard reaction products and phenylalanine degradation products of Xiangyan No.3 and K326 were similar, with no significant difference. YZ206-9 Maillard reaction products and phenylalanine degradation products generally lower than other varieties. Different varieties of flue-cured tobacco chemical composition and neutral aromatherapy substances in different proportions, there are also significant differences.