中图分类号：S572 文献标识号：A 文章编号：1001-4942（2025）06-0095-05

AbstractTo explore the suitable nitrogen application rate for non-origin cultivation of Daning sun-cured tobacco，a randomized block experiment was conducted by settng four nitrogen levels as 82.5kg/hm²（N1） ， 105.0kg/hm²（N2） ， 127.5kg/hm²（N3） and 150.0kg/hm²（N4） ，respectively. The effects of different nitrogen application rates on the growth，development and quality of Daning sun-cured tobacco were studied. The results showed that as the nitrogen application rate increased，the tobacco plant height gradually increased，the stem diameter gradually became larger，the leaves gradually became larger，and the accumulation of dry matter in roots，stems and leaves also gradually increased.When the application rate of nitrogen was 82.5 to 127.5 （204号 kg/hm² ， the black shank was gradually aggravated. When the nitrogen application rate was 105kg/hm² ，the incidence rate and disease index of mosaic were lower than those of the other treatments.When the nitrogen application rate exceeded 105kg/hm² ，the ratio of reducing sugar to total sugar，ratio of total sugar to nicotine，and ratio of total nitrogen to nicotine of sun-cured tobacco leaves decreased obviously，and the coordination of chemical components reduced significantly.In conclusion，optimizing nitrogen application rate could effectively improve the agronomic traits and dry mater accumulation of Daning sun-cured tobacco. When the nitrogen application rate was 105kg/hm² ，the comprehensive performance of Daning sun-cured tobacco plants was the best in growth and development，dry mater accumulation，resistance to diseases and coordination of chemical components.

KeywordsDaning sun-cured tobacco; Nitrogen application rate; Agronomic traits； Dry matter accumu-lation； Chemical components

受国内烟叶政策调控和国际控烟影响，不同类型烟叶的使用出现了新趋势[1]，晒黄烟因其独特的吸食质量和浓郁的香气，成为中式卷烟的重要原料。在烤烟型卷烟制品中，加入适量晒黄烟能够增香和降低焦油，从而减轻对人体的危害[2-3]。烟草是对土壤营养要求较为苛刻的作物，其中，氮是烟草生长发育中最为重要的营养元素[4-6]。在烟草生产过程中，土壤中氮素远不能为其提供充足养分，适当增施氮肥能够有效提高烟叶产质量，过多过少施用氮肥都会造成碳氮代谢不平衡、烟叶品质下降等不良后果[7-8]。张晨东研究表明，不同施氮量和氮磷钾比例对红土晒烟的产量、产值以及内在品质存在不同程度的影响，当施氮量达到 75kg/hm² 时烟时产量和产值均最高，施氮量增加到 105kg/hm² 时，烟叶产量反而略有下降，并且此时烟碱含量明显升高。符云鹏等[10]研究表明，随着氮用量的增加，晒烟的氮肥利用率和氮肥农学效率显著下降，烟碱、钾含量明显提高，总糖含量稍有增加;中部叶的中性香味物质总量（除新植二烯外）和感官质量以氮用量为 240kg/hm² 时最高。杨春元等[]研究表明，增施氮肥能促进晒黄烟品种“寸三皮”烟株生长和增加氮代谢，同时有利于提高茎围、节距、叶片长宽及叶面积等农艺性状。广西市是我国著名的晒黄烟种植地，其中大宁晒烟品种种植历史悠久，其烟气醇和、甜中带甘、香气馥郁，其有较高的研究价值，然而由于种植模式和种植地的限制，其种植面积逐年减少。……