不同栽培条件对烤烟农艺、经济性状及烟碱含量的影响

田间正交试验结果表明,种植密度(D)和施氮量(N)对烤烟的叶宽、叶长和叶面积没有显著影响,但随留叶数(T)的增加,上、中部叶变窄,叶面积变小;D对烤烟的经济性状没有影响。随着T减少,产量、产值显著地增大。在120kg/hm2的中等施氮水平下,烤烟的产量、产值、中等烟比例、下等烟比例、均价处于最佳状态。上部叶、中部叶烟碱含量随着D的减少而增加。所有部位烟叶烟碱含量均随着N的减少而减少。下部叶烟碱含量随着T的增加而减少。在120cm×45cm的种植密度+112.5 kg/hm2的氮肥施用量+18片/株的留叶数的农艺措施组合下,烟碱含量最低。

Effects of Different Cultural Practices on Nicotine, Agronomical and Economic Characters of Flue-cured Tobacco

The results of the experiment with the field orthogonal design showed that: 1) the plant density and fertilizer N had little effect on leaf length,width and leaf area of the tobacco;with the remaining leaves increasing,the width and area of upper and middle leaves decreased;2) plant density had no influence on the economic characters,when the remaining leaves reduced,the yield and production value increased significantly;yield,production value,proportion of middle and low grade tobacco leaf and average price were relatively satisfied with nitrogen application of 120kg/hm2;3) the nicotine content in tobacco leaf from upper and middle part decreased as fertilizer N reduced,while increased as the plant density reduced,and the nicotine content in lower leaf reduced when the remaining leaves increased.The nicotine content was the lowest when the plant density was 120cm×45cm,fertilizer N application was 112.5 kg/hm2 with 18 leaves remaining per plant.