江西烤烟主要化学特性的适宜性评价和聚类分析

为研究江西烤烟品质特征和区域特点,对江西省16个县烤烟烟叶的主要化学特性进行了检测、评价和聚类分析.结果表明:①江西烤烟烟叶钾、磷、烟碱、钾氯比、还原糖、两糖比等化学特性符合优质烤烟烟叶要求的样本比例分别为100％,89.03％,87.10％,90.32％,67.10％和61.29％,钾含量均在2％以上,烟碱均在3.5％以下,主要化学特性均较适宜和协调.②烟叶总氮、烟碱、还原糖、钾含量、糖碱比等在部位间差异显著,符合部位分布一般规律.③安福、会昌、永丰、泰和、乐安、峡江等6县烟叶可聚为一类,此类烟叶还原糖、糖碱比、两糖比较高,烟碱含量较低;赣县、资溪、兴国3县可聚为一类,此类烟叶总氮、烟碱含量、两糖比较高,糖碱比较低;广昌、石城、信丰、黎川、瑞金、宁都、宜黄等7县可聚为一类,此类烟叶还原糖、两糖比较低,其它化学特性中等.江西烤烟主要化学特性具有明显区域性特点.

Suitability Evaluation and Cluster Analysis of Main Chemical Properties of Flue-cured Tobacco in Jiangxi Province

In order to study the quality properties and regional specialities of flue-cured tobacco in Jiangxi Province,the main chemical properties of tobacco leaves from 16 counties in Jiangxi Province were tested,evaluated and cluster analyses conducted.The results showed that: 1) The samples in which the level of potassium,phosphorus,nicotine,potassium/chloride ratio,reducing sugar,or total sugar/reducing sugar ratio matched that required by quality tobacco,accounted for 100%,89.03%,87.10%,90.32%,67.10% and 61.29%,respectively,of the total samples;the potassium contents in all samples were more than 2%,and the nicotine contents were all lower than 3.5%;the chemistry was suitable and harmonious by and large.2) The differences of contents of total nitrogen,nicotine,reducing sugar and potassium,and sugar/alkali ratio among leaves from different stalk positions were significant and followed the general rule of distribution.3) The leaves from Anfu,Huichang,Yongfeng,Taihe,Le’an and Xiajiang counties could be clustered into one category,in which reducing sugar content,sugar/alkali ratio and total sugar/reducing sugar ratio were relatively higher,while nicotine content were lower;the leaves from Ganxian,Zixi and Xingguo counties could be clustered into the second category,in which the contents of total nitrogen and nicotine,and total sugar/reducing sugar ratio were relatively higher,while sugar/alkali ratio were lower;the leaves from Guangchang,Shicheng,Xinfeng,Lichuan,Ruijin,Ningdu and Yihuang counties could be clustered into the third category,in which reducing sugar content and total sugar/reducing sugar ratio were relatively lower,and the other chemical indicators were moderate.The main chemical properties of flue-cured tobacco in Jiangxi Province possessed obviously regional specialities.