北海湾各种形态氮的分布及其影响因素

根据 1 998年 1 0月和 1 999年 1 ,4,8月在广西北海湾的调查资料 ,首次详细讨论了该湾总氮 (TN)、总溶解氮 (DTN)、颗粒有机氮 (PON)、溶解有机氮 (DON)等各种形态氮的分布变化规律及其与环境因素的关系。结果表明 :该湾各形态氮的含量变化随季节而异 ,表现为春夏季高而秋冬季低 ;区域变化以南流江口海域含量较高 ,北海、合浦沿岸海域次之 ,其它海域较低。经相关分析 ,得出影响该湾各形态氮含量变化的主要环境因子是盐度 (S)和化学需氧量(COD) ,其次是悬浮物 (SS)和叶绿素a (Chl-a) ,pH和溶解氧 (DO)对其影响较小

A STUDY ON DISTRIBUTION OF VARIOUS STATES OF NITROGEN AND INFLUENCE FACTORS AT BEIHAI BAY,GUANGXI PROVINCE

Based on the quarterly investigation data at the Beihai Bay in Oct.1998 and Jan.,Apr.and Aug.1999,the distribution changes of various states of nitrogen,including total nitrogen(TN),dissolved total nitrogen(DTN),particle organic nitrogen(PON)and dissolved organic nitrogen(DON),were studied.The relationships of them to the environmental factors were also discussed.The results showed that the contents varied with different seasons and areas,higher in spring and summer and lower in autumn and winter,highest in the Nanliujiang estuary and higher in the nearshore zones of Beihai and Hepu,lower in other areas.The correlation analysis showed that the environmental factors influencing the change of the nitrogen contents were salinity and COD firstly,seston and Chl a secondly;pH and DO had slight influence.