测定分析了邵武市11个主要植烟乡镇52份C3F和B2F等级烟叶样品中总植物碱、总氮、钾、氯、还原糖和淀粉含量，计算了氮碱比、糖碱比和钾氯比等指标，并由此评价了邵武烟叶的化学质量。结果表明：总体上，邵武市烟叶常规化学成分含量适宜，比例协调，主要指标达到优质烟叶标准。个别乡镇中上部位烟叶化学指标差异较大，尚需在烟叶种植和烘烤过程中进行技术优化，特别是应该注重控制上部烟叶采收成熟度和结合烟叶素质调整烘烤工艺参数。

Fifty-two flue-cured tobacco leaves graded C3F and B2F were sampled from eleven towns of Shaowu City, their routine chemical components were measured which included the contents of total alkaloid (TA), total nitrogen (TN), K⁺, Cl^-, reducing sugar (RS) and starch, the ratios of RS to TA, TN to TA and K⁺ to Cl^- were calculated, and then these indices were applied to evaluate the chemical qualities of the flue-cured tobacco leaves. The results showed that in general the contents of TN, TA, RS, K⁺, Cl^- and starch were all in the suitable levels, and the above three ratios were also in the harmonious levels. The main indexes reached the corresponding high quality standards of Chinese flue-cured tobacco. There were obvious differences in the general chemical compositions between C3F and B2F from some towns, which indicated it was necessary to optimize the techniques in the processes of tobacco planting and curing, attentions should be paid to control the harvest maturity of the upper leaves and to adjust the curing technological parameters according to the status of fresh tobacco leaves especially.

S572

福建省烟草公司南平市公司项目(201735070024060)和“基于‘黄金叶’品牌原料符合度的关键技术研究与应用”(南烟司叶〔2016〕65号)资助。