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在云南昭通10个植烟生态区进行田间试验,以探讨土壤-气候、烟草品种及其互作和烟叶等级(部位)对烟叶中8类致香物质(酮类、醛类、醇类、酚类、酯/内酯类、酸类、杂环类和烯烃类)的影响.结果表明,昭通烟叶酮类和醛类质量分数相对较高,酚类、杂环类和烯烃类质量分数处于中等水平,醇类、酯/内酯类和酸类质量分数则相对较低.在不同土壤-气候和烟草品种条件下,各类致香物质质量分数的差异程度相对较低;但在不同烟叶等级下,各类致香物质质量分数差异均有统计学意义,且上、中部烟叶(B2F和C3F等级)中的质量分数明显高于下部(X2F)烟叶.土壤-气候、烟草品种及其互作和烟叶等级对昭通烟叶各类致香物质质量分数总变异的贡献率分别为15.6%,8.2%,11.5%和64.7%,可见烟叶等级(部位)对致香物质质量分数的综合影响最大,其他因素的影响则相对较弱.众多土壤-气候因素与烟叶致香物质质量分数有相关性,但其作用是次要的.相反,烟草不同部位致香物质的合成与代谢能力差异可能才是决定烟叶致香物质质量分数的主导因素.
Field experiments were conducted in 10 tobacco-growing ecotopes in Zhaotong, Yunnan province to investigate the effects of soil-climate, tobacco varieties and their interactions and tobacco leaf grades (parts) on 8 kinds of aroma components (ketones, aldehydes, alcohols, Esters, lactones, acids, heterocycles and alkenes) .The results showed that the mass fraction of ketones and aldehydes in Zhaotong tobacco leaves was relatively high, and the mass fraction of phenols, heterocycles and alkenes was moderate The levels of alcohols, esters / lactones and acids were relatively low.Under the conditions of different soil-climate and tobacco varieties, the difference of the mass fractions of aromatics was relatively low, but at different leaf levels , The quality scores of various aroma components were statistically significant, and the mass fraction of upper and middle tobacco leaves (B2F and C3F grade) was significantly higher than that of lower (X2F) tobacco leaves. Soil-climate, tobacco varieties and their interaction And tobacco leaf grades contributed 15.6%, 8.2%, 11.5% and 64.7% to the total variation of the aroma components of Zhaotong tobacco leaves respectively. It can be seen that the tobacco leaf grade (part) had the most comprehensive effect on the aroma components, and the other The impact of factors is relatively weak. Many soil-climate factors The mass fraction of substance caused by tobacco and incense have relevance, but its role is secondary. In contrast, synthesis and metabolism ability differences in different parts of Aroma tobacco is likely to determine the mass fraction of fragrant substances dominant factor in tobacco cause.