[ Objective] The aim was to study the effects of different harvesting time on yield and quality of flue-cured tobacco, to find out the most suitable harvesting time of tobacco leaves and to appropriately improve their ripening degree. [ Method] The experiment was conducted to study the influence of three different harvest time on economic characters and smoking quality of tobacco leaves through the field plot experiment. [Result] The results showed that economic characters and smoking quality of tobacco leaves all first increased and then decreased with the increase of harvest time putting off. In a whole, the harvesting time of the lower parts of leaves, the middle parts of leaves, and the upper parts of leaves were all the best under treatment 2, namely harvesting the lower parts of leaves at 14 days after top pruning, harvesting the middle parts of leaves at 28 - 35 days after top pruning, harvesting the upper parts of leaves at 49 - 56 days after top pruning. [ Conclusion ] The study provides a theoretical reference for improving the quality and industrial availability of tobacco leaves.%[目的]研究不同采收期对烟叶产质量的影响,寻找烟叶最适宜的采收时间,适度提高烟叶成熟度.[方法]通过小区试验对下部叶、中部叶、上部叶各设置3个不同采收时间处理,研究不同采收期对烟叶的等级结构和经济性状及评吸质量的关系.[结果]随着采收期的推迟,烟叶的上中等烟比例、黄烟比例、均价先升高后下降；烟叶香气质、香气量、杂气和余味同样表现为先升高后下降.综合表现来看,下部叶、中部叶和上部叶的采收期均以处理2质量最佳,即打顶后14 d采收下2棚叶、打顶后28～ 35 d采收中部叶、打顶后49 ～ 56d采收上2棚叶质量最好.[结论]该研究可为提高烟叶品质和工业可用性提供理论借鉴.
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