In general, nitrogen (N), silicon (Si), and planting method influence fragrant rice yield and lodging resistance. Nevertheless, the response of fragrant rice yield and lodging resistance to N-Si fertilization under different planting methods has not been examined in detail. Field trials were undertaken in the early seasons of 2018 and 2019. Two Si levels i.e., 0 kg Si h m⁻² (Si0) and 150 kg Si h m⁻² (Si1), three N levels i.e., 0 kg N h m⁻²(N0), 150 kg N h m⁻²(N1), and 220 kg N h m⁻²(N2) as well as three planting methods i.e., artificial transplanting (AT), mechanical transplanting (MT), and mechanical direct-seeding (MD) were set up for two indica fragrant rice cultivars i.e., ‘Yuxiangyouzhan’ (YX) and ‘Xiangyaxiangzhan’ (XY). Results revealed that the N-Si treatments and planting methods significantly affected the grain yield, lodging index, and some related parameters across the two cultivars. The mean fold change (FC) in grain yield for the different planting methods was ranked MD＞MT＞AT, while MT and MD have larger variation of FC in grain yield and lodging index as compared with AT. Besides, under all planting methods, the N1 and N2 treatments significantly increased grain yield and lodging index, while the Si1 treatment significantly reduced lodging index without affecting grain yield. There were also significant Si and N interaction effects on grain yield and lodging resistance, with the Si1N2 treatment producing the best balance of grain yield and lodging resistance. The treatments differed in grain yield and yield-related traits such as yield components, biomass yield and photosynthetic properties, as well as in lodging index and lodging-related traits such as plant height, N and Si content in the stem sheath, and biomass allocation ratio. Overall, this study revealed that the 150 kg Si h m⁻² coupled with 220 kg N h m⁻² treatment showed the best positive effects on balancing grain yield and lodging resistance under all planting methods. Additionally, fragrant rice planted by mechanical methods requires more stricter N-Si fertilization because mechanical planting methods produce greater variation in the physio-biochemical characteristics that underlie grain yield formation and lodging resistance.

一般而言，氮（N）、硅（Si）和种植方式会影响香稻产量和抗倒伏性。然而，尚未详细研究不同种植方法下香稻产量和抗倒伏性对N-Si施肥的响应。田间试验在 2018 年和 2019 年初进行。两个 Si 水平，即 0 kg Si h m ^-2 (Si0) 和 150 kg Si h m ^-2 (Si1)，三个 N 水平，即 0 kg N h m ^-2 ( N0)、150 kg N h m ^-2 (N1)、220 kg N h m ^-2 (N2)以及人工移栽(AT)、机械移栽(MT)和机械直播(MD)三种种植方式) 分别设置了两个籼稻香稻品种，即'玉香油沾'（YX）和'香鸭香沾'（XY）。结果表明，N-Si 处理和种植方法显着影响了两个品种的籽粒产量、倒伏指数和一些相关参数。不同种植方式的粮食产量平均倍数变化（FC）为MD＞MT＞AT，而MT和MD在产量和倒伏指数上的FC变化比AT大。此外，在所有种植方式下，N1和N2处理显着提高了产量和倒伏指数，而Si1处理显着降低了倒伏指数而不影响产量。Si 和 N 相互作用对粮食产量和抗倒伏性也有显着影响，Si1N2 处理产生了粮食产量和抗倒伏性的最佳平衡。各处理在籽粒产量和产量相关性状（如产量成分、生物量产量和光合特性）以及倒伏指数和倒伏相关性状（如株高、茎鞘中氮和硅含量、生物量分配）方面存在差异比率。总体而言，这项研究表明，150 kg Si h m^-2与 220 kg N h m ^-2处理在所有种植方法下均显示出最佳的平衡谷物产量和抗倒伏性的积极作用。此外，机械化种植的香米需要更严格的氮硅施肥，因为机械化种植会导致水稻产量形成和抗倒伏性的生理生化特征发生更大的变化。