摘要
3年的试验观测结果表明,密云水库走马庄副坝库湾网箱养鱼区TN、TP、BOD、chla含量和浮游藻类、浮游动物、大肠杆菌密度均高于库区.而SD、DO则低于库区。以SD、chla、TP和COD为参数,计算Carlson指数,分析水体营养状况,网箱养鱼区为中-富营养型,库区为中营养型。网箱养鱼区由于大量投饵和鱼类粪便的积累,增加了水体中氮、磷等营养盐类的负荷,打破了自然状态下淡水生态系统的物质交换和能量流动,加速了水体的富营养化进程。
Three years' study indicates that TN. TP BOD. Chla and the density of plankton,zooplankton and colibaccillus in the region of Mazhuang net-cage fishculture of Miyunreservoir are more and SD. OD are less than that in other regions of the reservoir. UsingSD, Chla, TP, COD as indexes, the Carlson component is computed. By analysing the tropb-ic condition of water body. the region of net-cage fishculture belons to meso-eutrophic andthe other regionsin the reservoir belong to mesotrophic. Intensive feeding and fishes' excre-ment accumulated in the region of net-cage fishculture have increased the nutrients load-ing, destroyed the material exchange and energy flow, promotesd the eutrophication of wa-ter body.
出处
《首都师范大学学报（自然科学版）》
1993年第4期11-15,共5页
Journal of Capital Normal University：Natural Science Edition
