【摘要】 应用实验室培养法研究了大亚湾大鹏澳网箱养殖海域磷酸盐（PO₄-P）在沉积物-海水界面上的交换通量；并根据改进的连续函数法计算了PO₄-P在沉积物-海水界面上交换速率。结果表明：（1）PO₄-P在沉积物-海水界面上的交换通量随时间的变化关系满足以e为底的指数衰减函数；（2）整个调查海域PO₄-P在沉积物-海水界面上的交换速率为0．27～2．47 mmol·m^-2·d^-1。其中,网箱养殖区PO₄-P的交换速率(0．82～2．47 mmol·m^-2·d^-1)明显高于对照区PO₄-P的交换速率(0．27～0．62 mmol·m^-2·d^-1),长时期的养殖活动使养殖区沉积环境中的磷得以积累,PO₄-P在沉积物-水界面上的交换速率升高。更多还原

【Abstract】 The benthic fluxes of PO₄-P at the sediment-water interface in fish cage area of Dapengao were measured by laboratory incu- bation experiments,and a function method with dependence of the exchange rate was developed.In the function method,the average exchange rates of PO₄-P at the sediment-water interface were calculated.The results show that:（1）the relation between PO₄-P ex- change fluxes and incubation time fit the e exponent attenuation function;（2）the exchange rates of PO₄-P at the sediment-water inter- face varied from 0.27 to 2.47 mmol·m^-2·d^-1in the whole area,but the exchange rates varied from 0.82 to 2.47 mmol·m^-2·d^-1in the fish cage area,were obviously higher than those in the control area varied from 0.27 to 0.62 mmol·m^-2·d^-1.Since phosphor were ac- cumulated gradually in the long period breeding process,the exchange rates of PO₄-P in the fish cage area increased accordingly.更多还原