Fragrant rice is a high-valued quality rice type which is gaining much popularity over the globe due to its better cooking qualities and special aromatic characteristics. Selenium (Se) and silicon (Si) could improve the growth and yield of rice; however, the combine effects of Se and Si (Se-Si treatments) on rice grain quality, aroma and lodging in fragrant rice were rarely investigated. The pot and field experiments were conducted with two fragrant rice cultivars i.e., Xiangyaxiangzhan and Yuxiangyouzhan, grown under three Se levels i.e., 0, 120, and 240 mg kg⁻¹ of soil (for pot experiment) and 0, 300, and 600 kg ha⁻¹ (for field experiment) regarded as LSe, MSe and HSe, respectively and two Si levels i.e., 0 and 60 mg kg⁻¹ of soil (for pot experiment) and 0 and 150 kg ha⁻¹ (for field experiment) regarded as -Si and +Si, respectively. Results depicted that the Se-Si treatments regulated head rice yield, grain yield and yield related traits and the HSe+Si treatment sustainably improved the grain yield and head rice yield by regulating plant growth, antioxidant response and malondialdehyde (MDA) contents in fragrant rice. The Se-Si treatments also improved the grain 2AP contents owing to regulation in the proline, pyrroline-5-carboxylate (P5C) and γ-aminobutyric acid (GABA) contents. Besides, Se-Si treatments also regulated the grain quality attributes and influenced the plant Se contents. Moreover, the Si mitigated Se-induced lodging resulted from changes in the lodging parameters i.e., lodging index, fresh weight per tiller, pushing resistance force, plant height and bending moment. Overall, the Se and Si application improved the grain yield and regulated the dry weight accumulation, antioxidant attributes and quality attributes. Meanwhile, the Si application mitigated the negative effect of Se-induced lodging in fragrant rice.

香米是一种高价值的优质大米，由于其更好的烹饪质量和特殊的芳香特性而在全球范围内广受欢迎。硒和硅可以提高水稻的生长和产量。然而，很少研究硒和硅（硒化硅处理）对香米的稻米品质，香气和倒伏的综合影响。盆栽和田间试验是用两种香气水稻品种，分别在0、120和240 mg kg ^-1土壤（用于盆栽试验）和0、300和600 kg的3种硒水平下生长的，分别为香雅香栈和玉香油站。ha ^-1（用于现场实验）分别视为LSe，MSe和HSe，以及两个Si含量，即0和60 mg kg ^-1的土壤（用于盆栽试验）以及0和150 kg ha ^-1（用于现场实验）分别视为-Si和+ Si。结果表明，Se-Si处理调节稻米产量，籽粒产量和产量相关性状，而HSe + Si处理通过调节香米中的植物生长，抗氧化反应和丙二醛（MDA）含量来可持续提高稻谷产量和稻米产量。Se-Si处理还通过调节脯氨酸，5-羧酸吡咯啉（P5C）和γ-氨基丁酸（GABA）的含量提高了2AP含量。此外，硒硅处理还调节了谷物的品质属性并影响了植物的硒含量。此外，硅缓解了硒诱导的倒伏，这是由于倒伏参数的变化所致，例如倒伏指数，每耕till的鲜重，推阻力，植物高度和弯曲力矩。总体，硒和硅的施用提高了谷物的产量，并调节了干重的积累，抗氧化特性和质量特性。同时，硅的施用减轻了香米中硒诱导的倒伏的负面影响。