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沉积物中营养盐对大鹏湾赤潮影响的初步探讨
杨炼锋, 李锦蓉, 余汉生
国家海洋局南海监测中心广州 510300

摘要:

1991年3月中旬在南海大鹏湾海域用小型箱式采泥器采集了0－2cm和5－7cm层的样品。对所采样品用比色法测定了沉积物中可被交换的溶解态营养盐含量。分析结果表明：表层沉积物中可被交换的活性磷酸盐含量很高，N／P值很低。另外，根据同时采集的水样分析结果：水体中活性磷酸盐的浓度很低，且N／P值很高。1992年3月的调查结果又证实：在上覆水中活性磷酸盐的浓度很高，且N／P值很低。因此，我们认为进一步研究表层沉积物和上覆水中活性磷酸盐对水体的供给与大鹏湾赤潮的关系对研究大鹏湾赤潮的成因有重要意义。

关键词: 赤潮营养盐大鹏湾

DOI：

分类号:

基金项目:国家自然科学基金!9389008

PRELIMINARY STUDY ON CONTRIBUTIONS TO RED-TIDE FROM NUTRIENTS IN SEDIMENT IN DAPENG BAY

Yang Lianfeng, Li Jinrong, Yu Hansheng

South China Sea Monitoring Center, SOA, Cuangzhou 510300

Abstract:

0 – 2 cm and 5 – 7 cm layer sediment samples were collected by box sampler in Dapeng Bay at the middle of March, 1991. Determination of exchangable nutrients in sediment showed rich (low) orthophosphate and low (high) N/P value in surface sediment (water column). In March, 1992 cruise a high orthophosphate concentration and low N/P value were determined in the near seabed water layer.

The above finding is significant for study of the red-tide study in Dapeng Bay.

Key words: Red tide, Nutrients, Dapeng Bay

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