关键词: 红掌, 红掌, 杂交育种, 诱变育种, 多倍体育种, 转基因育种

Abstract: In order to clarify the changing law of chemical components of organic flue-cured tobacco and provide some references for tobacco production in Jinggu, the chemical components variation trend of Jinggu organic flue-cured tobacco from 2011 to 2014 was analyzed. The results showed that: (1) the contents of total and reducing sugar were generally high and relatively stable; whereas, the contents of nicotine, total nitrogen, potassium and chlorine varied in different years; (2) the contents of total and reducing sugar, as well as the ratio of total nitrogen to nicotine, were significantly different among the years (P＜0.05); the ratio of potassium to chlorine were dramatically distinct (P＜0.01); nevertheless, there was no significant difference in the contents of nicotine and chlorine, the ratio of total sugar to nicotine and the dissimilarity between total sugar and reducing sugar (P＞0.05); (3) the CUI of organic tobacco in 2012 was the highest in the four years, followed by that in 2013, the CUI of most sorts of tobacco in these two years were higher than those of 2011 and 2014, whose availability was relatively poor; the CUI of different parts of organic tobacco leaves was in an order of middle leaves＞ upper leaves＞ lower leaves; as for the variance degree of CUI, that of the lower leaves was the largest over the years, followed by that of the middle leaves, and that of the upper leaves was relatively stable.