海水中的铁是海洋浮游植物的微量营养元素之一,有些实验证实,海水中的铁往往是浮游植物生长的限制因素。在近海,其主要来源是陆地排水。为了解长江口附近海域中的铁的分布规律及对该海域的生产力有无影响,我们在六十年代某年5、8、11月和次年2月对长江口附近海域中的铁作了4个航次的调查,结果如下。 Iron in seawater is one of the micronutrients of marine phytoplankton, and some experiments confirm that iron in seawater is often a limiting factor in the growth of phytoplankton. In the offshore, the main source is land drainage. In order to understand the distribution of iron in the sea area near the Changjiang Estuary and whether it has any impact on the productivity of the area, we conducted a survey of the iron in the sea near the Changjiang Estuary in May, August and November in the 1960s and the following February 4 voyage survey, the results are as follows.