In the Guangzhou sea area, the annual average concentrations of dissolved inorganic nitrogen (DIN), phosphorus (PO_4~(3-)-P) and silicate (SiO_3~(2-)-Si) were 1.63 mg/L, 0.043 mg/L and 2.59 mg/L, respectively.

• 广州海域DIN、PO_4~(3-)-P和SiO_3~(2-)-Si年平均值分别为1.；63mg/L、0