Silicic acid fertilizer and method of raising seedlings of paddy rice

摘要

PROBLEM TO BE SOLVED: To provide a silicic acid fertilizer easily and inexpensively producible, further having reduced unevenness in a component composition, excellent in uniformity, and further having a high effect of the soundness in the growth of products such as paddy even in a small amount of blending.SOLUTION: Provided is a silicic acid fertilizer obtained by mixing a silicic acid material containing a calcium silicate hydrate as the main component, being porous and also having a granular shape with a granular acid material. The acid material is, e.g., made of one or more kinds selected from sulfate, nitrate and chloride. The silicic acid material is, e.g., made of lightweight cellular concrete. The ratio of the acid material in the total content of the silicic acid material and the acid material is preferably 5 to 70 mass%.