烤烟高打脚叶与二次打顶技术研究

为了优化烟叶等级结构，把不适销等级烟叶消灭在田间，达到提高烟叶质量的目的：在商洛市5县安排了高打脚叶与二次打顶技术试验与应用。结果表明高打脚叶与二次打顶后，烟叶质量提高，等级结构优化，高打脚叶不仅能提高烟叶产量，产值，而且能提高烟叶等级结构与质量，二次打顶后，烟叶产量虽有所降低，但产值，质量明显提高，上中等烟比例提高，中部烟比例增加，上部烟比例减少达20％以上，可用性大大提高，是减少低次烟的有效技术措施。

Technique on High-cutting Bottom Leaf and Double Tip-pruning of Tobacco

The experiment of high-cutting bottom leaf and double tip pruning was carried out in five counties of shangluo city to optimize configuration,exterminate the unwell sell grade and improve quality of to bacco leaves.The result indicated that:cutting bottom leaves to higher place and double tip pruning leaves can improve quality and optimize configuration of tobacco leaves.Cutting bottom leaves to higher place not only can improve yield and income but also can optimize configuration and quality of tobacco leaves.Double tip pruning can make the yield reduced but the income and quality improved and the proportion of first-grade and middle-grade leaves increased.It also make the central part leaves increased and the to pleaves decreased more than 20% and the usability increased evidently.The measurement was very useful to decrease proportion of low quality leaf of tobacco.