海水中可溶性无机硅(以下简称硅),是海洋浮游植物所必须的营养盐之一,尤其是对硅藻类浮游植物、放射虫和硅质海绵,硅更是构成机体不可缺少的组分。在海洋浮游植物中硅藻占很大部分,硅藻繁殖时摄取硅使海水中硅的含量下降。浮游植物死亡下沉分解又释放出硅,使海水中硅的含量再生。另外放射虫也能排泄出二氧化硅,硅质死亡迅速释放二氧化硅进入海水中。总之硅的含量对于海洋生物产量具有直接和间 Sea water soluble inorganic silicon (hereinafter referred to as silicon), is one of the essential nutrients of marine phytoplankton, especially for diatom phytoplankton, radioactive insects and siliceous sponge, silicon is an integral component of the body. In the marine phytoplankton diatoms account for a large part of the diatoms when silicon intake so that the silicon content in seawater decreased. Phytoplankton death sinking decomposition and release of silicon, so that the content of silicon in seawater regeneration. In addition, radioactive worms can excrete silicon dioxide, silicon death quickly release silica into seawater. In short, the content of silicon has a direct and indirect relationship with the production of marine organisms