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通过对2004~2007年海水样品的采集、检测及分析获得渤海湾N、P、Si营养盐的数据资料。讨论了渤海湾N/P比、Si/P比、Si/N比的变化趋势、年际变化影响因素,以及N/P比与植物生长限制因子的关系。分析结果表明:4 a来,渤海湾水质富营养化严重。营养盐类发生了不同程度的变化,无机氮含量一直处于较高水平,磷酸盐含量则呈明显的下降趋势。近年来营养盐污染有加重趋势,N/P比大致呈逐年增加趋势,P成为近年来渤海湾浮游植物生长的限制因子。
The data of N, P, Si nutrients in Bohai Bay were obtained through the collection, detection and analysis of seawater samples from 2004 to 2007. The change trend of N / P ratio, Si / P ratio and Si / N ratio in Bohai Bay, the influencing factors of interannual variation and the relationship between N / P ratio and plant growth restriction factors were discussed. The results show that: 4 a, the Bohai Bay water eutrophication serious. Nutrients have changed to varying degrees, inorganic nitrogen content has been at a high level, the phosphate content showed a significant downward trend. In recent years, nutrient pollution tends to aggravate, with N / P ratio increasing year by year. P has become a limiting factor for phytoplankton growth in the Bohai Bay in recent years.