刘帅东 徐磊 赵龙 朱浩

摘 要：根据烟叶感官质量对湖南郴州烟叶样品进行聚类分析，结合感官质量和烟叶常规化学成分相关性，预测湖南郴州烟叶常规化学成分的适宜范围。结果表明：总氮、总糖、还原糖含量分别与香气质、杂气、刺激性、余味呈显著相关关系;烟碱含量与香气质和余味呈显著相关关系;钾含量与香气质和杂气呈显著相关关系。对于中部烟叶：烟碱含量在1.69%～3.06%时，香气质和余味较好;总氮含量在1.51%～2.21%、还原糖含量在21.64%～29.68%、总糖含量在22.64%～30.92%时，烟叶的香气质、杂气、刺激性、余味表现较好;钾含量在1.71%～2.40%时，烟叶的香气质和杂气表现较好。对于上部烟叶：烟碱含量在2.83%～4.3%时，香气质和余味较好;总氮含量在1.79%～2.79%、还原糖含量在9.52%～19.84%、总糖含量在10.27%～21.77%时，烟叶的香气质、杂气、刺激性、余味表现较好;钾含量在1.98%～2.69%时，烟叶的香气质和杂气表现较好。

关键词：烟叶;化学成分;感官质量;相关性;聚类分析

中图分类号：TS47文献标识码：A文章编号：1003-5168（2020）19-0028-04

Abstract： According to the sensory quality of Chenzhou tobacco leaves in Hunan Province， cluster analysis was carried out to predict the suitable range of the conventional chemical composition of Chenzhou tobacco leaves. The results showed that the contents of total nitrogen， total sugar and reducing sugar were significantly correlated with fragrance temperament， miscellaneous gas， irritant and aftertaste respectively; nicotine content was significantly correlated with fragrance temperament and aftertaste; potassium content was significantly correlated with fragrance temperament and miscellaneous gas respectively. For middle tobacco： when nicotine content was 1.69%～3.06%， aroma quality and aftertaste were better; when total nitrogen content was 1.51%～2.21%， reducing sugar content was 21.64%～29.68%， total sugar content was 22.64%～30.92%， aroma quality， miscellaneous gas， irritant and aftertaste were better; when potassium content was 1.71%～2.40%， aroma quality and miscellaneous gas were better. For the upper leaves： when the nicotine content was 2.83%～4.3%， the aroma quality and aftertaste were better; when the total nitrogen content was 1.79%～2.79%， the reducing sugar content was 9.52%～19.84%， and the total sugar content was 10.27%～21.77%， the aroma quality， miscellaneous gas， irritant and aftertaste were better; when the potassium content was 1.98%～2.69%， the aroma quality and miscellaneous gas were better.

Keywords： tobacco;conventional chemical compoents;sensory quality;correlation;cluster analysis

湖南郴州作为南岭丘陵生态区焦甜醇甜香型烤烟烟叶的典型产地，其烟叶具有焦甜香突出，醇甜香较明显，甜香香韵较丰富等品质特征，是国内卷煙工业企业较为青睐的烟叶产地之一[1]。烟碱、总氮、还原糖、总糖、钾、氯是烟叶的6种常规化学成分，其含量与烟叶感官质量有着密不可分的关系，可用于表征烟叶内在质量[2]。受品种、气候、地域等因素的影响，烟叶常规化学成分含量存在较大差异，从而影响烟叶可用性。通过计算代表烟叶质量状况的化学成分可用性指数，可对烟叶化学成分可用性进行综合评价[3-5]。……