烤烟叶位与主要化学成分及外观质量的分析

[目的]为了解安顺当前主栽品种云烟85烟叶不同叶位主要化学成分及农艺性状的变化情况,生产出适应卷烟品牌需求的优质烟叶,确保优质原料的有效供给,制定出与工业原料需求相匹配的生产技术体系,切实搞好优化烟叶结构,为烟叶生产提供技术指导。[方法]选择一块长势正常烟地,按5点取样法对100株烟株1~18叶位烟叶进行挂牌,烘烤后按照叶位归类进行相关数据测量及送检,分析叶位间化学成分及外观质量。[结果]随着烟叶叶位增加,烟碱含量增加;随着叶位增加,烟叶钾含量降低;烟叶单叶重从第1叶位至15叶位随着叶位增加,单叶重增加,16叶位达到最大值为19.08克/片,从16叶位开始后逐渐下降;最大叶长出现在11~12叶位为74.95 cm;最大叶宽出现在第7叶位为26.5 cm。

Analysis of Growth Laws of Leaves of Flue-cured Tobacco in Various Periods

The growth laws of leaves of flue-cured tobacco in different positions in various periods were summarized. The results showed that the growth speed of new leaves of flue-cured tobacco increased constantly until their growth was the fastest, and then it reduced irreversibly. The length and width of leaves in each position increased fastest when they grew depending on photosynthates instead of or- ganic compounds from functional leaves. Therefore, it is concluded that the increases of leaf length, width and area, and dry matter, and the peak of photosynthetic rate appear successively during the process of leaves of flue-cured tobacco, and the leaf area correction coefficient of leaves of flue-cured tobacco is related to the shape of leaves, which are affected by leaf position and the variety of flue-cured tobacco. The study can provide scientific reference for further research on the growth laws of leaves of flue-cured tobacco.