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调查结果表明，桑沟湾ＩＮ的垂直分布均匀；该海域受人类频繁活动的影响，其平面分布和量值都有显著的季节性差异；ＮＯ３－Ｎ是该海域ＩＮ的主要存在形式。在海带养殖期间，ＩＮ和ＩＮ／ＩＰ比值始终处于低水平，其季节变异明显受到该湾初级生产水平的制约，故ＩＮ必然成为桑沟湾初级生产的限制因素，另外，海带养殖也加速了其养殖期间湾内水体中ＩＮ的物质循环速率。
The results show that there is a vertical distribution of IN in Sanggou Bay. There is a significant seasonal variation in the distribution and magnitude of NO in the area under the influence of frequent human activities. NO3-N is the predominant form of IN in this area. During the period of kelp culture, the IN and IN / IP ratios were always at a low level, and the seasonal variations were obviously restricted by the primary production level of the bay. Therefore, IN inevitably became the limiting factor for the primary production of Sanggou Bay. In addition, kelp farming accelerated its The material circulation rate of IN in the bay during aquaculture.