烟叶品质不是取决于某一种或几种化学成分的绝对含量，而是由多种成分的协调配合才能产生良好的品质效果。多年来，烟草科技工作者对烟u－｛化学成分与其品质的关系进行了长期的研究，提出了许多化学指标，并以此为基础，综合外观特征和评吸鉴定综合评判烟叶品质。一、施水克值 The quality of tobacco leaves does not depend on the absolute content of one or several chemical components, but the coordination of multiple components can produce good quality results. Over the years, tobacco science and technology workers conducted a long-term study on the relationship between the chemical composition and the quality of tobacco, put forward many chemical indicators and used it as a basis to comprehensively evaluate the quality of tobacco with the combination of appearance characteristics and appraisal of smoking appraisal. First, water grams value