【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。更多还原

【Abstract】 0-2cm and 5-7cm 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 sur-face sediment (water column). In March, 1992 cruise a high orthophosphate concen-tration 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.更多还原