He Mengjie, Li Qiang, Ma Ya, Zhou Pengtao, Kang Kang, Wu Boran
College of Resources, Hunan Agricultural University, Changsha, Hunan, China.
College of Agriculture, Hunan Agricultural University, Changsha, Hunan, China.
Front Plant Sci. 2025 Aug 4;16:1641798. doi: 10.3389/fpls.2025.1641798. eCollection 2025.
Silicon (Si) is widely used in agricultural crop practices. However, the effects of varying Si application rates on tobacco growth and quality remain unclear. Therefore, this study applied four different Si concentrations, i.e., 0, 750, 1500 and 3000 kg/ha of Si (S0, S50, S100 and S200), examined the impact of different Si concentrations on tobacco ( L. 'Yunyan 87') growth, nutrient utilization, and economic quality under field conditions. The results demonstrated that Si application significantly improved tobacco growth, the biomass significantly increased by 19.5%-26.53%; during button stage, the plant height significantly increased by 15.38%-19%. Si also enhanced nutrient use efficiency, particularly for nitrogen and potassium. The utilization efficiency of N and K fertilizer were significantly increased by 27.42%-43.71% and 40.25% - 44.63%, respectively. Furthermore, Si improved leaf physical properties, enhancing single-leaf weight and leaf area, while reducing leaf density and midrib ratio, optimizing leaf quality by improving the sugar-alkali ratio and potassium-chloride balance. Notably, the reducing sugar content in upper leaves increased by 15.21% with S50 treatment, while the chlorine content in middle leaves was decreased by 11.11% with S100. Additionally, among all treatments, S50 achieved the highest proportion (94.75%) of medium and high-quality tobacco leaves, along with a 15.70% increase in yield and a 30.76% boost in output value compared to S0. However, excessive Si application (3000 kg/ha) negatively affected quality, increasing nicotine levels and disrupting the sugar-alkali ratio, which elevate leaf irritancy. In conclusion, moderate Si application (750-1500 kg/ha) is an effective strategy for enhancing tobacco yield and quality, offering a sustainable approach to optimize cultivation practices.
硅（Si）在农作物种植中被广泛应用。然而，不同施硅量对烟草生长和品质的影响仍不明确。因此，本研究施加了四种不同的硅浓度，即每公顷0、750、1500和3000千克硅（S0、S50、S100和S200），在田间条件下研究了不同硅浓度对烟草（L. '云烟87'）生长、养分利用和经济品质的影响。结果表明，施硅显著促进了烟草生长，生物量显著增加了19.5% - 26.53%；在团棵期，株高显著增加了15.38% - 19%。硅还提高了养分利用效率，尤其是对氮和钾。氮肥和钾肥的利用效率分别显著提高了27.42% - 43.71%和40.25% - 44.63%。此外，硅改善了叶片物理特性，增加了单叶重量和叶面积，同时降低了叶片密度和中脉比例，通过改善糖碱比和钾氯平衡优化了叶片品质。值得注意的是，S50处理使上部叶片还原糖含量增加了15.21%，而S100处理使中部叶片氯含量降低了11.11%。此外在所有处理中，S50处理获得的中、高品质烟叶比例最高（94.75%），与S0相比，产量提高了15.70%，产值提高了30.76%。然而，过量施硅（每公顷3000千克）对品质产生负面影响，增加了尼古丁含量并破坏了糖碱比，从而提高了叶片刺激性。总之，适度施硅（750 - 1500千克/公顷）是提高烟草产量和品质的有效策略，为优化种植实践提供了一种可持续的方法。
