近年来渤海湾营养盐变化趋势研究.PDF

第 29卷 　第 2期 海 洋 环 境 科 学 Vo l . 2 9 , No . 2 2 0 1 0 年 4 月 MAR IN E ENV IRONM EN TAL SC IEN CE Ap ril . 2 0 0 9 近年来渤海湾营养盐变化趋势研究 阚文静 ,张秋丰 ,石海明 ,徐玉山 ,王 　彬 ,江洪友 (国家海洋局天津海洋环境监测中心站 ,天津 300450) 摘 　要 : 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 。 关键词 : 渤海湾 ;营养盐 ;富营养化 ;变化趋势 中图分类号 : P733. 4　　文献标识码 : A 　　文章编号 : (20 10) 02 023804 Study on var ia tion trend of nutr ien t sa lts in Boha i Bay KAN W enj ing, ZHAN G Q iufeng, SH I H aim ing, XU Yushan,WAN G B in, J IAN G Hongyou ( Tianj in M arine Environm ental Mon itoring Center, SOA , Tianj in 300450 , Ch ina) Ab stract: The data of n itrogen , pho sp horou s and silicon nu trient were ob tained by collecting, detecting and analyzing the seawater sam p les in the Bohai B ay 2004 ～2007. The variation trend and effective factor of N , P, Si and N / P, Si/ P, Si/N in Bohai B ay, as well as the relation sh ip s of N / P and the lim itation factors of the p hytop lankton grow th were discu ssed. The resu lt showed that the water quality in the Bohai B ay was seriou sly bad in recent four years. The nature of nu trient was more or less changed, the content of n itrogen is al ways in a h igh level, but the content of pho sp horou s is obviou sly reduced. The pollu tion of nu trients and rate of N and P were increased year by year. P was the lim itation factor of phytop lankton grow th in the Bohai B ay in recent years. Key words: