留叶数对腾冲烟叶产质量的影响

为探索留叶数对腾冲烟叶产质量的影响,通过设置大田试验,分析不同留叶数处理对烟株农艺性状、经济性状、烟叶物理特性、外观质量、化学成分及评吸质量的影响。结果表明,随着留叶数的降低,烤烟株高下降,腰叶、顶叶长宽呈增加趋势,烟叶产量、产值呈降低趋势。当留叶数由22片降至16片时,C2F烟叶单叶重、厚度、叶面密度、填充值显著增加,含梗率下降明显。留叶数19片时C2F烟叶颜色、成熟度分值相对较高,留叶数22片时B1F身份、油分、色度分值相对较高,但不同处理间外观总分无显著差异。随着留叶数的减少,烟碱含量逐渐增加,糖碱比逐渐降低。与其他处理相比,留叶数16片时烟叶香气质、香气量、杂气、刺激、余味等指标相对较低。综合烟叶产质量判断,腾冲烤烟种植以留叶数22片和19片（去除底脚叶3片）效果较好。

Influence of Remained Leaves on Yield and Quality of Flue-cured Tobacco in Tengchong

To explore the influence of remained leaves on the yield and quality of tobacco leaves in Tengchong, field experiments were conducted to analyze the effects of different numbers of remained leaves on the agronomic traits, economic traits, physical characteristics, chemical composition, appearance and sensory property of flue-cured tobacco. The results showed that with the decreasing number of remained leaves, the plant height of flue-cured tobacco decreased, the length and width of the waist and top leaves increased, and the yield and output value of tobacco showed a decreasing trend. When the number of remained leaves decreased from 22 to 16, the single leaf weight, thickness, density, and filling power of C2F leaves increased significantly, and the percentage stem decreased significantly. The color and maturity scores of C2F leaves were relatively high when the remained leaves were 19, and the scores of B1F body, oil, and color intensity were relatively high when the remained leaves were 22, but there was no significant difference in the total scores of visual appearance among different treatments. As the number of remained leaves decreased, the nicotine content gradually increased, and the sugar/ nicotine ratio gradually decreased. Compared with other treatments, the tobacco leaf aroma quality, aroma amount, miscellaneous, irritation and aftertaste were relatively low when the remained leaves were 16. According to the comprehensive quality of flue-cured tobacco, the suitable numbers of remained leaves in Tengchong are 22 and 19 with 3 bottom leaves removed.