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烤烟是一种叶用经济作物,叶片既是生产的主要产品,也是进行光合作用的主要器官。据报导,作物产量中有90—95%是通过光合作用制造的,只有5—10%是通过根部吸收土壤养分而形成的。在烤烟的生长发育过程中,光照条件与烟叶质量关系很大,若光照充足,则有利于烟叶品质的提高,反之则叶薄色淡,品质下降。因此,如何控制烟田合理的群体结构,保持适宜的叶面积,是实现烤烟优质适产的主要措施之一。
Flue-cured tobacco is a leaf with cash crops, leaves are both the main product of production, but also the main organs for photosynthesis. It is reported that 90-95% of crop yields are made by photosynthesis and only 5-10% are formed by the uptake of soil nutrients by the roots. In the process of growth and development of flue-cured tobacco, the lighting conditions have a great relation with the quality of the tobacco leaf. If the light is sufficient, it will be beneficial to the improvement of the quality of the tobacco leaf; on the contrary, the leaf is thin and pale, and the quality declines. Therefore, how to control the reasonable population structure of tobacco fields and maintain the appropriate leaf area are one of the main measures to achieve good quality tobacco production.