水稻是具有代表性的硅酸植物,一般成熟时水稻茎叶中含硅量占干物质重量的11%,高的达22%,而一般粮食作物只有1%左右。据资料介绍,每生产50公斤稻谷需从土壤中吸收有效硅(硅酸)8—10公斤,连作5年以上的稻区每生产500公斤稻谷要从土壤中带走有效硅120—170公斤。由于人们重视对氮、磷、钾肥料的施用、忽视了硅素的供给,导致土壤中有效硅含量急剧下降,耕 Rice is a representative silicic acid plant. Generally speaking, the amount of silicon contained in stems and leaves of rice is 11% of the weight of dry matter and 22% of the maximum, while the average grain crop is only about 1%. According to the information, every kilogram of rice to be produced needs 8-10 kilograms of available silicon (silicic acid) to be absorbed from the soil and 120-170 kilograms of effective silicon from the soil for every 500 kilograms of rice produced in the paddy fields for more than five years. Due to the emphasis on nitrogen, phosphorus and potassium fertilizer application, ignoring the supply of silicon, resulting in a sharp decline in the effective silicon content in soil, tillage