水稻是典型的需硅植物,茎叶中硅的含量可达到千重的10～20%。水稻生长发育要吸收氮、磷、钾3大主要营养元素外,硅是水稻所需的第4大量营养元素。很多水稻田常年不施或施很少有机肥料,致使土壤有效硅缺乏的情况日趋严重,并已成为水稻高产优质的限制因子。水稻施硅肥后,由于茎叶的硅化细胞含量增加,有效地 Rice is a typical silicon-requiring plant, and the content of silicon in stems and leaves can reach 10 to 20% of the dry weight. Rice growth and development to absorb nitrogen, phosphorus and potassium three major nutrients, the silicon is the fourth large number of nutrients required by rice. Many perennial rice fields do not apply or apply very little organic fertilizers, resulting in an increasingly serious shortage of available silicon in soil and has become a limiting factor for high yield and quality of rice. After silicon fertilizers are applied, due to the increased silicified cell content of stems and leaves, effectively