胶州湾东部海水中氮的含量和分布

THE FORMS AND DISTRIBUTIONS OF NITROGEN OF SEAWATER IN EASTERN JIAOZHOU BAY

根据 1990年 11月到 1991年 8月胶州湾东部 4个航次的调查资料 ,讨论了各种氮的含量变化及分布情况 :溶解无机氮含量范围为 1.12～ 34 .8μmol/ dm3,年平均为 11.1μmol/ dm3。秋季硝酸氮为溶解无机氮的主要形式 ,占 68% ,平均为 11.2 μmol/ dm3。其他 3个季节氨氮含量最高。冬、夏两季溶解态有机氮含量分别占总氮的 69%和 66% ,是主要形态。其分布大致呈自东北向西南递减变化。

The present work investigates the concentrations and distrabutions of Nitrogen in the eastern Jiaozhou Bay based on the data of four cruises from Nov.1990 to Aug.1991.The concentration of dissolved inorgenic nitrogen(DIN) ranges from 1.12 μmol/dm 3 to 34.8 μmol/dm 3,the annunal average is 11.1 μmol/dm 3.Nitration is the main forms of DIN, about 68 %, in autumn and 68 percent of DIN,average is 11.2 μmol/dm 3. The concentration of NH 4 N is highest.The concentration of dissolved nitrogen is higher,especially in winter and spring,77 percent and 72 percent of total nitrogen,the annunal average is 42.3 μmol/dm 3.The concentration of dissolved orgenic nitrogen is 69 % and 66 % in the two seasons. The distributions of different nitrogen show higher along the seashore. The higher value zone is spotted in eastern and northerneast of Jiaozhou Bay.