采用土壤盒栽和稻瘟病菌接种，研究了施用高效硅肥对水稻稻瘟病抗性的影响。结果表明：施用高效硅肥，水稻叶瘟和穗瘟的病情指数分别降低５０５％和２６８％；植株ＳｉＯ２含量提高３～４倍，细胞壁增厚，全Ｎ、蛋白－Ｎ、非蛋白－Ｎ等含量减少，剑叶表面硅化细胞增加，而不施硅肥的则很少。统计分析表明：水稻植株ＳｉＯ２含量与叶瘟、穗瘟的病情指数呈负相关，ｒ＝－０９９２５和－０９６８３；水稻体内全Ｎ和非蛋白－Ｎ含量与叶瘟病情指数呈正相关，ｒ＝０９６９５和０９８４７。 Inoculation with soil box and Magnaporthe grisea to study the effect of high silicon fertilizers on rice blast resistance. The results showed that the disease index decreased by 505% and 268% respectively when applied with high-efficiency silicon fertilizer, rice leaf blast and head panicle. The content of SiO2 increased by 3 ~ 4 times, and the cell wall thickening, total N, protein-N, Protein-N and other content decreased, the surface of the flag leaves increased silicification, while the application of silicon is very small. Statistical analysis showed that the content of SiO2 in rice plants was negatively correlated with the disease index of leaf blast and head blast, r = -09925 and -09683. The contents of total N and non-protein-N in rice and leaf blast The index was positively correlated, r = 09695 and 09847.