【摘要】 根据1998年8～10月每1次对大亚湾大鹏澳网箱养鱼水体26h定点连续观测,采用国内常用的营养状态质量指数 (INQ))法,并选用COD、TIN、PO4-P和Chla为评指标,分析了各网箱水体的富营养化程度,讨论了A网箱INQ 值的周日变化;用质量平衡法估算了网箱养鱼水体的氮、磷负荷量。分析结果表明,8～10月份各网箱水体营养况状属中营养水平 ;INQ 值的周日变化中 ,高峰出现在12 :00～18:00,各网箱水体富营养化程度随着放养密度的增加而增大,8、9月份最为明显。网箱养鱼的水体的氮、磷负荷从7月至9月逐月增大 ,10月开始下降。更多还原

【Abstract】 h-observation at fixed site were conducted monthly in the area of fish cage-farming in Dapengao Cove in August to October 1998. The eutrophication level in seawater body of the cages was evaluated by the method of nutritive quality (INQ), taking COD, TIN, PO4-P and Chl-a as assessment indexes, respectively. Daily variation of INQ was discussed for the seawater of fish cage-farming; In addition, the loads of N and P were estimated by the mass-balance method. Results showed that seawater in the cages did not reach the eutrophication level in August to October 1998, and the eutrophication level of seawater in the cages was increasing with the increasing of fish density, it was the most significant in August and September. The Loads of N and P from the fish cage-farming increased in July to September, and started to decrease in October.更多还原