以2010年云南、 河南、 福建、 广东、 江西等省份11个不同生态环境地点， 三个部位烟叶共495份样品为试验对象， 应用近红外光谱分析不同生态环境烟叶的品质特性， 结果表明： 相同生态环境下， 上部与中部烟叶的品质特性差异较小， 而上部与下部、 中部与下部烟叶的品质特性差异较为明显； 不同生态环境下烟叶的品质特性间的相似性关系具有较好的一致性， 其分析集与验证集特征投影值的相关系数达0.98以上。 同时提出了一种相似度计算方法来表征不同生态环境下烟叶品质特性之间的相似关系， 其结果可为烟叶的种植规划、 质量管理以及烟叶配方等提供量化的参考数据。

Four hundred ninety five samples from 3 parts of tobacco were collected from 11 different ecological environments in 2010 to analyze the characteristics of tobaccos in different ecological environments with near infrared spectroscopy. The results indicate that the differences are remarkable both between lower and upper parts and between lower and middle parts of tobacco, while negligible between upper and middle parts of tobacco under the same ecological environment. Good stability and consistency were showed by the similarity of characteristics of tobaccos under different ecological environments, and the projection correlation coefficient of analysis set and validation set is over 98%. This article also proposes a method of measuring the similarity between characteristics of tobaccos from different ecological environments. The results can provide reference data to quantify tobacco’s planting programming, production processing and quality management.