烟草是我省的一种重要经济作物。田间管理搞得好,可以提高烟叶品质,为烤烟提供上等原料。适时封顶(平顶、打顶)打杈则是提高烟叶质量的一项有效措施。适期封顶的依据是:根据当地无霜期的长短,采收烘烤时间,地力与烟株长势,拟留叶的多少而定。当前,我省普遍是打顶迟,留叶多,甚至不封顶。烟花满地开。不仅减产,也降低品质。因为烟株进入生殖阶段,中下部叶子的营养物质,逐渐流向顶部,供应花序和种子需要。如不及时打顶,中下部叶片会变薄,重量减轻,而上部叶片营养也会不足,叶小而轻,造成减产降质。为避免 Tobacco is an important cash crop in our province. Field management is well done, you can improve the quality of tobacco, flue-cured tobacco to provide first-class raw materials. Timely cap (flat top, topping) twisting is an effective measure to improve the quality of tobacco. The basis for the appropriate cap is: According to the length of the local frost-free period, harvesting roasting time, soil fertility and tobacco growth, leaving the number of leaves to be determined. At present, our province is generally hit late, leave leaves more, and do not even cap. Fireworks everywhere. Not only cut production, but also reduce the quality. Because the tobacco plants enter the reproductive stage, the nutrients in the middle and lower leaves gradually flow to the top to supply inflorescence and seed needs. If not timely topping, the lower part of the leaves will be thinner, lighter weight, and the upper leaves of nutrition will be insufficient, leaves small and light, resulting in reduced production and quality. To avoid