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利用2003~2013年秦皇岛海域海水质量监测区、海水增养殖区、赤潮监控区以及近岸海域生态监控区内的多站位实测数据,根据正态分布原理分析了氮、磷营养盐和营养盐结构的长时序变化规律。结果表明,在过去11 a间,秦皇岛海域表层海水的无机氮(DIN)浓度与水质超标率呈现上升趋势,活性磷酸盐(DIP)浓度则表现为规律性显著的波动变化特征,超标率整体减少;NO3-N占DIN的比例先减后增,NH4-N则与其相反,氧化性环境先减弱后增强;磷为该海域浮游植物生长的主要限制因子。
According to the data of multiple stations in Qinhuangdao seawater quality monitoring area, seawater increasing culture area, red tide monitoring area and the coastal ecological monitoring area from 2003 to 2013, nitrogen and phosphorus nutrients and nutrients were analyzed according to the normal distribution principle Structure of the long-term changes in the law. The results showed that in the past 11 years, the inorganic nitrogen (DIN) concentration and water quality excess rate of surface seawater in Qinhuangdao area showed an upward trend while the active phosphate (DIP) concentration showed regular and fluctuating characteristics, ; The proportion of NO3-N to DIN decreased first and then increased, NH4-N was the opposite, the oxidative environment first weakened and then enhanced; and phosphorus was the main limiting factor of phytoplankton growth in this area.