烤烟不同时期叶片生长规律分析

摘要

The growth laws of leaves of flue-cured tobacco in different positions in various periods were summarized.The results showed that the growth speed of new leaves of flue-cured tobacco increased constantly until their growth was the fastest,and then it reduced irreversibly.The length and width of leaves in each position increased fastest when they grew depending on photosynthates instead of organic compounds from functional leaves.Therefore,it is concluded that the increases of leaf length,width and area,and dry matter,and the peak of photosynthetic rate appear successively during the process of leaves of flue-cured tobacco,and the leaf area correction coefficient of leaves of flue-cured tobacco is related to the shape of leaves,which are affected by leaf position and the variety of flue-cured tobacco.The study can provide scientific reference for further research on the growth laws of leaves of flue-cured tobacco.%对烤烟不同时期、不同部位叶片生长规律进行总结.结果显示:烤烟新生叶片全日生长量不断加速,依次成为全株生长速度最快的叶片,然后,依次进入不可逆转的生长减速.各叶位叶片长度和宽度最快生长期均在从主要依靠功能叶片输入有机物生长向主要依靠自身光合作用合成有机物生长期间出现.进而推理提出烤烟叶片生长过程中长度和宽度增加、叶面积增加、干物质增加最快时期和光合生产率最高时期依次出现的观点,以及烤烟不同品种、不同部位叶片因外形不同和同一叶片前后不同时期因外形发生变化而叶面积校正系数不同的观点,可为烤烟叶片生长规律进一步研究提供参考.