Optimizing Deep Nitrogen Placement and Silicon Fertilizer Use for Enhanced Rice Productivity and Lodging Resistance Under Different Irrigation Modes

作者：Dicai Ao, Ziyi Li, Zhi Dou, Ping Liao, Jiehui Song, Qi-Gen DAI, Hui Gao, Qiang Xu · 发表于：Food and Energy Security · 年份：2025 · DOI：10.1002/fes3.70166 · 被引用次数：2 · 研究领域：Crop Yield and Soil Fertility、Rice Cultivation and Yield Improvement、Silicon Effects in Agriculture

ABSTRACT Water, nitrogen, and silicon fertilizers are key factors influencing rice productivity and lodging resistance. In recent years, alternate wetting and drying irrigation (AWD) and deep nitrogen placement (DNP) have been identified as effective agronomic strategies to improve yield, nitrogen use efficiency, and reduce lodging risk. However, the combined effects of these strategies and foliar silicon fertilizer application on rice yield, nitrogen use efficiency, and lodging resistance remain unclear. To address this, a 2‐year field experiment was conducted with the rice cultivar Nangeng 5718, comparing four water and fertilizer management practices: control (CK), conventional water and nitrogen management (CON), AWD combined with DNP (OPT1), and a split application of panicle fertilizer with foliar silicon application on the basis of OPT1 (OPT2). Results showed that OPT1 and OPT2 treatments increased grain yield and nitrogen recovery efficiency by 5.3%–25.9% and 56.2%–114.7%, respectively, compared to CON, but also increased the lodging index by 15.0%–38.2%. While both OPT treatments enhanced rice productivity, AWD and DNP under high nitrogen levels did not improve lodging resistance. OPT2 further increased yield and recovery efficiency by 0.9%–8.8% and 4.7%–23.4%, respectively, while reducing the lodging index by 4.7%–12.6%. The decrease in the lodging index under OPT2 was associated with improved breaking strength, breaking force, lignin, and cellulose, while yield gai...