烤烟不同部位烟叶主要化学成分与叶长的关系  

Relationship between Main Chemical Components in Leaf and Leaf Length in Different Positions in Tobacco (Nicotiana tabacum L.)

作　　者：李东亮[1] 张水成[2] 许自成[1] 

机构地区：[1]河南农业大学农学院,河南郑州450002 [2]黄淮学院农林科学系,河南驻马店463000

出　　处：《作物学报》2008年第5期914-918,共5页Acta Agronomica Sinica

基　　金：烟草行业栽培重点实验室基金项目(TCKL06003);河南省烟草专卖局重点科技攻关项目(HYKJ200610)

摘　　要：采集我国南方烟区166份烤烟品种K326不同部位叶样品,研究烤烟主要化学成分与叶片长度的关系。结果表明:烟碱、总氮、还原糖、钾、氯、氮碱比、糖碱比、钾氯比、叶长在样品间存在广泛的变异;氯含量和钾氯比在部位间差异不显著,叶长、烟碱含量、氮碱比和糖碱比在部位间差异显著;总氮、还原糖含量在中部、下部叶间差异未达到显著水平,但二者均与上部叶差异显著;上部、中部叶的钾含量差异不显著,但二者均与下部叶差异显著;在一定范围内,烤烟上部叶烟碱、总氮和钾含量随叶长的增加而增加,氮碱比随叶长的增加而降低;中部叶烟碱、还原糖、钾含量和钾氯比随叶长的增加而增加,氯含量和氮碱比随叶长的增加而降低;下部叶还原糖含量、糖碱比和钾氯比随叶长的增加而增加,烟碱、总氮和氯含量随叶长的增加而下降。叶长63.0cm对上部叶的烟碱、总氮含量和糖碱比与下部叶的钾、氯含量均是一个较为敏感的长度。It is important for cigarette industry to get flue-cured tobacco leaves with accordant quality between agronomic characters and chemical components. Agronomic characters, however, are often inconsistent with chemical components, and this problem brings the difficulty of blending and decreases the benefits of cigarette industry. The purpose of this paper was to study the correlation between agronomic characters and chemical components and to provide theory basis for tobacco grading. By applying methods of descriptive statistics, ANOVA, multiple comparisons and degree distribution, 166 leaf samples of different positions including three grades of B2E C3F, and X2F from K326, a flue-cured tobacco cultivar widely planted in main tobacco areas in southern China, were selected as materials to study the relationship between chemical components and leaf length. The results indicated that there existed extensive variation among samples for chemical components and leaf length. The differences were not significant for chlorine content and ratio of potassium to chlorine （K2O/Cl^-）, and were significant for leaf length, nicotine content, ratio of total nitrogen to nicotine （TN/nicotine） and ratio of reducing sugar to nicotine （RS/nicotine） among positions of flue-cured tobacco leaves. For total nitrogen and reducing sugar （RS） contents, cutters and lower leaf did not show significant difference, but both had significant difference with these in upper leaf. Similarly, for potassium （K2O） content, these were non-significant difference in cutters and upper leaf, but significant difference in lower leaf. In the given range, the contents of nicotine, TN and K2O increased with the increase of leaf length of upper leaf; however, TN/nicotine decreased with the increase of leaf length of upper leaf. The nicotine, RS, K2O contents, and K2O/ Cl^- content increased with the increase of leaf length of cutters; Cl^- content and T N/nicotine decreased with the increase of leaf length of cutters. The RS content, RS/nicotin

关 键 词：烤烟 叶位 化学成分 叶长 关系分析 

分 类 号：S572[农业科学—烟草工业] TS207.3[农业科学—作物学]