摘要
对育苗期间水质变化状况作了探讨，获得以下研究结果：①在大黄鱼育苗期间，主要水质指标变化范围为pH，7.8～8.1；NH3-Nt，0，13～417mg／L；NH3－Nm，0.005～0.167mg／L；NO2－N，0．004～0．612ms／L；COD，5．32～11．53mg／L。②水体中投放适量的藻类可有效改善水质，维持良好的水质状况。③投饵后水质均发生一定的变化，待别是氨氮浓度有明显升高，育苗过程中饵料投喂种类的改变对水质变化有明显的影响。④水体中仔鱼集群区氨氮浓度比非集群区高，表明排地分解也是促使氨氮浓度增高的因素之一。
The hydrochemical state of the rearing pond for Pseudosciaena crocea larvae was studied, and the results are summarized as forllows:1. The ranges of main hydrochemical parameter values during the rearing period are:pH: 7. 8~8. 1, NH3 -Nt: 0.13~4. 17mg/L, NH3 -Nm : 0. 005~0. 167mg/L, No MN: 0. 04~ 0. 162mg/L and COD 5. 23~ 11. 53mg/L.2. The water quality can be effectively improved and maintained in a good state by adding appropriate amount of algae solution in the ponds near estuary.3. The water quality certainly changes after feeding, especially the concentration of NH3 -N increases significantly. The changes of feedstuff species influence water quality greatly.4. The concentration of NH3-N in the area of larval fish aggregation is higher than that of non-aggregation, also, which shows that excreta decomposition is one of the factors increasing the concentration of NH3-N.
出处
《上海水产大学学报》
CSCD
1999年第2期97-104,共8页
Journal of Shanghai Fisheries University
基金
上海水产大学科研启动基金!98-25号
关键词
大黄鱼
仔鱼
水化学
育苗池
水质
Pseudosciaena crocea, larval fish, hydrochemistry, cultural pond for rearing ,estuary
