海洋中铁的来源、形态和对初级生产力的限制作用

Iron Sources, Existing Forms and Their Limiting Action on the Primary Productivity of Phytoplankton in Seawater

在海洋中，铁和Ｎ、Ｐ等主营养盐一样，也是一种限制浮游植物初级生产力的重要因素。由于铁是一种化学活性较高的元素，所以海水中铁的存在形态、来源及沉降会直接影响其生物可利用性。目前人们一般采用预富集／原子吸收法（ＡＡＳ）或是借助于电分析技术（如催化极谱）来测定海水中的铁。

In the ocean,iron,like the major nutrients(e g nitrate、phosphate, etc ),is also an important factor limiting the primary productivity of phytoplankton The existing forms,sources and sinking of iron will affect its bioavailability because of its high chemical reactivity At present,people generally adopt preconcentration/AAS or turn to electroanalytical technology(e g catalytic polarography)to determine iron in seawater