中图分类号：S572 文献标识号：A 文章编号：1001-4942（2025）06-0064-07

AbstractIn order to explore the effects of different planting methods and remained leaf numbers on growth，yield and quality of flue-cured tobacco，a two-factor field split-plot experiment was carried out in Jiange County，Guangyuan City，Sichuan Province in 2O19.Two planting methods with equal row spacing （A1）and wide-narow row （A2） were set in the main plot，and three remained leaf numbers were set as 14 to 16（B1），16 to 18（B2）and 18 to 20（B3）per plant in the subplot，which formed 6 treatments（A1B1， A1B2，A1B3，A2B1，A2B2 and A2B3）.The efects of different treatments on the agronomic and economic traits of tobacco plants，and the contents of conventional chemical components and sensory smoking quality of flue-cured leaves were studied.The results showed that the plant height of tobacco increased with the increase of remained leaf number after topping under the two planting methods，while the maximum leaf area decreased，the yield of flue-cured tobacco increased，and the average price，proportion of middle and superior tobacco and output value increased first and then decreased.The output value，average price and proportion of superior tobacco of A2B2 treatment were obviously higher than those of the other treatments.There were diferences in the content of conventional chemical components in flue-cured tobacco leaves among diferent treatments.The content and coordination of conventional chemical components in flue-cured tobacco were overall better under A2B2 treatment.The sensory smoking quality of flue-cured tobacco leaves （C3F） increased first and then decreased with the increase of remained leaf number，and reached the highest value when the remained leaf number was 16 to 18 per plant. The aroma quality，and smoke and taste of A2B2 treatment were the best.In summary，the treatment of wide-narow row planting with 16 to 18 remained leaves per plant （A2B2）had the best comprehensive yield and quality，folowed by the treatment of equal row spacing combined with 16 to 18 remained leaves per plant（A1B2）.The conclusion of this study could providethe theoretical basis and data support for high-yield and good-quality cultivation of flue-cured tobacco.

KeywordsTobacco; Planting method; Remained leaf number; Yield and quality

烟草作为重要的经济作物，在我国农业生产中占有重要地位，适宜的配套栽培技术可以有效提高烟叶质量[1]。生产过程中，需根据各地的实际情况采取相应的栽培措施以提高当地烟叶产质量[2]。种植密度影响作物个体发育与群体结构，是调控烟草产量与品质性状的重要农艺措施，是影响烟草农艺性状、经济性状、化学性质和感官评价等指标的关键因子[3-4]。有研究表明，低密度烟草种植方式虽然有利于烟株个体发育，但是不能满足生产所需的理想群体要求，从而不利于提高烤烟的经济效益；当烤烟栽培过密时，烟株个体间竞争加剧，生长发育受到抑制，并最终影响到烤烟产量与质量[5-7]。适宜的种植密度和单株留叶数是烟叶合理群体结构的基础

宽窄行交替种植可以有效调节烟草植株的行间距[8]，增强通风和透光性，改善田间小气候，进而改善烟草的光合特性，提高叶片叶绿素和可溶性糖含量以及叶片净光合速率，同时有利于开展田间管理，使得调控烟草后期生长发育变得更加便利[9]。在宽窄行种植方式下，随着窄行变小和宽行变大，烟株的株高和最大叶片面积会出现显著差异；采取适当距离的宽窄行种植方式可以有效增加成熟期烟草的株高和叶面积，进而改善烟草质量，提高产量[10] 。

烤烟单株留叶数能调节烟株生长空间，合理分配光热资源，协调烟叶化学成分等，对烟叶产质量有显著影响[1I-14]。……