自然界的植物一般都含有极微量的硅酸,其中禾本科、蕨类,苔藓等一些种类含有较多的硅。水稻是含硅量最多的植物之一,通常茎叶中的二氧化硅可达10％～20％。一般老稻田区,多年不施用农家肥,且施肥品种单一,增施硅肥效果明显,而新开的稻田施硅肥肥和不施硅肥没有显著差异。另外施硅肥能提高水稻抗病性、抗旱性及抗倒伏的能力。 Plants in nature generally contain a trace amount of silicic acid, of which some species, such as grasses, ferns and moss, contain more silicon. Rice is one of the plants with the most silicon content, and the silica in the stem and leaves can reach 10% -20% normally. In general, the old paddy fields have not applied peasant fertilizer for many years and have a single fertilizer application with obvious effect of adding silicon fertilizer. However, there is no significant difference between the newly-opened paddy fertilizers and non-silicon fertilizers. In addition, silicon fertilizer can improve disease resistance, drought resistance and lodging resistance.