三都湾虾蛄弄网箱养殖区底质硫化物初步研究

A preliminary study on the sulfide in surfacial sediment in Xiagunong of Sandu Bay

为了估算福建三都湾网箱养殖区养殖容量，研究了三都湾虾蛄弄网箱养殖区的底质硫化物含量空间分布、变化规律及污染状况．研究结果表明，底质硫化物含量在网箱养殖区内（205—1377mg／kg。平均值为642mg／kg）明显高于网箱养殖区外部（171～246mg／kg，平均值为209mg／kg）．底质硫化物平均污染指数1．78，底质的老化风险级别为4，已达到严重污染程度，老化风险已高，沉积环境已经恶化．

In order to evaluate the carrying capacity of cage farming waters in Sandu Bay,the distribution, variations and pollution status of sulfide in Xiagunong, the largest area for cage farming,in Sandu Bay were studied. The results showed that the sulfide contents,from 205 to 1 377mg/kg,with an average of 642mg/kg were obtained inside the cage area,and from 171 to 246mg/kg,with an average of 209mg/kg were measured from outside the cage farming areas. The sulfide contents inside the cage area were much higher than those outside the cage area. The average pollution index of sulfide is 1.78. The risk grade of sediment degradation is 4. It indicates that the sediments in the cage farming area were seriously contaminated and were already at the high risk of deterioration.