Abstract: The effects of mineral silicon on the yield and dry matter accumulation of aerobic rice 906 were studied by controlling the application rate of mineral silicon. The results showed that when the application rate of mineral silicon was 45 kg/hm~2, the yield and dry matter accumulation of rice plants were the highest. There was no significant difference in yield and dry matter accumulation after increasing the amount of mineral silicon（P＜0.05）. Therefore, urea application rate of 160 kg/hm~2, superphosphate application rate of 75 kg/hm~2, potassium chloride application rate of 75 kg/hm~2and mineral silicon application rate of 45 kg/hm~2are conducive to improving rice yield and dry matter accumulation.