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对2007年在闽江口的全潮观测数据分析表明,在河口过程,悬沙、无机氮、硅与潮汐的变化相反,表现出涨潮时降低,落潮时升高的变化特征;而水位、盐度与潮汐的变化相一致;磷与潮汐的变化不明显,磷酸盐缓冲机制受到悬沙与水相互作用的控制.闽江口水体中硅酸盐、磷酸盐、无机氮浓度范围分别为0.63～9.00 mg.L-1、0.013～0.075 mg.L-1和0.33～4.24mg.L-1,因受农业、工业和人类生活的影响,观测的无机氮含量较20多年前有大幅上升的趋势.闽江口无机氮、硅浓度与盐度呈显著负相关.研究表明闽江口无机氮、磷、硅营养盐生物地球化学过程中,无机氮、硅在闽江口过程主要是保守性行为,磷则是非保守性行为.陆源冲淡水给闽江口补充了丰富的无机氮、硅营养盐,而陆源冲淡水与海水中磷含量差别不大,硅∶氮∶磷比值表明闽江口磷是浮游植物的限制性因子.
The analysis of the tide-observing data in the Minjiang Estuary in 2007 shows that in the estuary process, suspended sediment, inorganic nitrogen and silicon show opposite characteristics with the tide, showing the characteristics of low tide and low tide. The water level, salt Phosphorus and tidal changes are not obvious, and the phosphate buffer mechanism is controlled by the interaction of suspended sediment and water.The concentrations of silicate, phosphate and inorganic nitrogen in Minjiang Estuary waters are 0.63 ~ 9.00 mg.L-1, 0.013-0.075 mg.L-1 and 0.33-4.4 mg.L-1, the observed inorganic nitrogen content increased significantly from 20 years ago due to the agricultural, industrial and human life impacts .The concentration of inorganic nitrogen and silicon in Minjiang Estuary was significantly and negatively correlated with the salinity.The results showed that during the biogeochemical process of inorganic nitrogen, phosphorus and silicon nutrients in Minjiang Estuary, the process of inorganic nitrogen and silicon in Minjiang Estuary was mainly conservative , Phosphorus is a non-conservative behavior.Lu source of freshwater to the Minjiang Estuary to add a wealth of inorganic nitrogen and silicon nutrients, and terrigenous red water and seawater phosphorus content is not very different, silicon: nitrogen: phosphorus ratio indicates Minjiangkou phosphorus Is a limiting factor in phytoplankton.