高溶氧对闭合养殖系统中生物滤器功能的影响  

The effect of hyperoxic condition on a biofilter in a closed recirculating aquaculture system

作　　者：张锡[1] 吴垠[1] 马妮娜[1] 纪瑾[1] 徐哲[1] 

机构地区：[1]大连水产学院农业部海洋水产增养殖学与生物技术重点开放实验室,辽宁大连116023

出　　处：《大连水产学院学报》2008年第4期309-314,共6页Journal of Dalian Fisheries University

基　　金：辽宁省科技厅攻关项目(990368)

摘　　要：研究了在封闭式循环养殖系统中,不同溶氧水平对生物滤器功能的影响及对大菱鲆Scophthalmusmaximus幼鱼生长的影响。结果表明:当水中溶氧(DO)为10.11 mg/L(B组)和11.91 mg/L(C组)时,生物滤器功能建立仅需要8 d时间,比对照组(A组,充空气)提前4 d;当水中总氨氮(TNH3-N)浓度为0.696 mg/L时,B2组(DO为12.11 mg/L±0.52 mg/L)24 h对TNH3-N的总去除率为89.60%,比对照A2组早6 h降低到0.2 mg/L以下;30 d的饲养结果表明,高溶氧可以提高大菱鲆幼鱼的增重率、特定生长率和饲料转化率;当水中TNH3-N浓度为0.700 mg/L(H组)时,在高溶氧下饲养的大菱鲆幼鱼各项生长指标均与对照D组无显著差异(P>0.05)。The effects of different oxygen concentrations on biofiher fuction and growth performance in juvenile turbot （Scophthalmus maximus） were studied in a closed recirculating aquaculture system. The results showed that it took 8 days for the biofilter function establishment at dissolved oxygen concentration of 10.11 and 11.91 mg/L, earlier than normal condition. The 24 h total ammonia （TNH3 - N） removing rate of 89.60% was observed at （TNH3 -N） concentration of 0. 696 mg/L in the hyperoxic group, and the time when （TNH3 -N） concentration was reduced to 0.2 mg/L was 6 h earlier in the hyperoxic group than that in the control group. The 30 day feeding trail showed that there was improvement in weight gain rate, specific growth rate, and food conversion under the hyperoxic condition. No significant difference in growth was observed in the hyperoxic groups even though the （TNH3 - N） concentration was kept at 0. 700 mg/L（P 〉0.05）.

关 键 词：大菱鲆 高溶氧 封闭循环系统 氨氮 亚硝酸氮 生物滤器 

分 类 号：S959[农业科学—水产养殖] S965.3[农业科学—水产科学]