近年来渤海湾营养盐变化趋势研究

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。

Study on variation trend of nutrient salts in Bohai Bay

The data of nitrogen,phosphorous and silicon nutrient were obtained by collecting,detecting and analyzing the seawater samples in the Bohai Bay 2004~2007.The variation trend and effective factor of N,P,Si and N/P,Si/P,Si/N in Bohai Bay,as well as the relationships of N/P and the limitation factors of the phytoplankton growth were discussed.The result showed that the water quality in the Bohai Bay was seriously bad in recent four years.The nature of nutrient was more or less changed,the content of nitrogen i...