【摘要】 根据2010年春季、夏季及秋季无棣、牟平及乳山三个贝类增养殖区九个航次的调查资料,分析了表层海水中DIN、PO4-P、COD、N/P值及营养水平的季节变化特征。结果显示:除牟平增养殖区夏、秋季DIN分别超三类及二类海水水质标准外,其它贝类增养殖区水质状况良好,基本符合一类或二类海水水质标准。DIN:无棣增养殖区含量为0.299 mg/L(5月)、0.263 mg/L(8月)及0.270 mg/L(10月),季节性变化不大;牟平增养殖区含量为0.122 mg/L(5月)、0.430 mg/L(8月)及0.364 mg/L(10月),夏秋季明显高于春季;乳山增养殖区含量较低,分别为0.094 mg/L(5月)、0.085 mg/L(8月)及0.164mg/L(10月)。乳山、牟平及无棣的PO4-P含量偏低,分别为0.007 34、0.009 97及0.023 0 mg/L,96%的站位N/P值(原子比)大于16,整个养殖季均呈潜在性P限制营养状态;山东西部增养殖区富营养化程度高于东部,乳山增养殖区营养指数为0.1,属贫营养水平。更多还原

【Abstract】 According to nine surveys in shellfish culture area in Wudi,Muping and Rushan in May,August and October 2010,seasonal distributions of surface DIN,PO4-P,COD,N/P and trophic level were analyzed.The results showed that although in May and October the DIN in Muping exceeded the grade Ⅱ and grade Ⅲ of Seawater Quality Standard,the seawater quality in the other culture areas was fine,generally met the grade Ⅰ or Ⅱ of the standard.The concentration of DIN in three seasons was 0.299 mg/L(May),0.263 mg/L(August) and 0.270 mg/L(October) in Wudi,there were no distinct seasonal change.It was 0.122 mg/L(May),0.430 mg/L(August) and 0.364 mg/L(October) in Muping,summer and autumn>spring.The DIN content was lower in Rushan,It was 0.094 mg/L(May),0.085 mg/L(August) and 0.164 mg/L(October).The PO4-P was 0.007 34 mg/L,0.009 97 mg/L and 0.023 0 mg/L in Rushan,Muping and Wudi correspondingly.The PO4-P was low and the N/P ratio by atoms of 96 percent of stations exceeded 16,during the culture period,all three culture areas showed a P-limiting trphic state.The eutrophication of the western breeding area is rather high than the eastern in Shandong.The nutrent index in Rushan was 0.1;the trophic state was at a oligotrophic level.更多还原