循环水及生物絮团系统对大规格罗非鱼种生长及水质的影响  

Study on the growth performance and culture water quality of tilapia large-sized fingerlings in recirulating aquaculture system and bio-floc technology

作　　者：曹宝鑫[1] 张南南 吴霞 罗国芝[1,2,3] 谭洪新[1,2,3] CAO Bao-xin;ZHANG Nan-nan;WU Xia;LUO Guo-zhi;TAN Hong-xin(Shanghai Engineering Research Center of Aquaculture,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Freshwater Aquatic Genetic Resources,Ministry of Agricultureand Rural Affairs,Shanghai Ocean University,Shanghai 201306,China;National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学,上海水产养殖工程技术研究中心,上海201306 [2]上海海洋大学,农业农村部淡水水产种质资源重点实验室,上海201306 [3]上海海洋大学,水产科学国际级实验教学示范中心,上海201306

出　　处：《淡水渔业》2020年第2期107-112,共6页Freshwater Fisheries

基　　金：上海水产养殖工程技术研究中心项目(19DZ2284300)。

摘　　要：为比较越冬期循环水系统(RAS)与生物絮团系统(BFT)两种模式下大规格罗非鱼(Oreochromis niloticus)鱼种的生长性能与养殖水质的差异。选择RAS组与BFT组,进行为期67 d的养殖,测定养殖过程中罗非鱼种的生长情况以及水质的变化情况。结果显示,RAS组与BFT组增重率和特定增长率分别为(870.69±33.25)%、(3.39±0.05)%/d和(659.47±62.84)%、(3.02±0.13)%/d,RAS组显著高于BFT组;在水质控制方面,RAS组氨氮和亚硝酸盐从养殖初期到实验结束均维持在较低水平,而BFT组在初期氨氮和亚硝酸盐有升高的趋势,峰值分别达到了(4.53±0.72)mg/L和(6.68±1.8)mg/L,分别在第3天和第6天下降到较低水平,硝酸盐两组均呈现不断积累的趋势。结果表明,RAS系统养殖罗非鱼生长速度要高于BFT系统,RAS系统在水质控制方面略优于BFT系统。This experiment was divided into recirulating aquaculture system(RAS)group and bio-floc technology(BFT)group for 67 days of cultivation,the water quality and the growth of fish in the cultivation process to compare the growth performance and culture water quality of tilapia large-sized fingerlings in RAS and BFT during winter.The results showed that the weight gain rate and specific growth rate of RAS group and BFT group were(870.69±33.25)%,(3.39±0.05)%/d,(659.47±62.84)%and(3.02±0.13)%/d,respectively.RAS group was significantly higher than BFT group.In terms of water quality control,RAS group of ammonia nitrogen and nitrite from the early stages of breeding to the end of the experiment were maintained in low level,while the BFT group at an early stage of ammonia nitrogen and nitrite tended to rise,the peak is(4.53±0.72)mg/L and(6.68±1.8)mg/L,then the third and sixth day down to a lower level,respectively,and presented a tendency of the continued accumulation of nitrate in the two groups.The results showed that the growth rate of tilapia cultured was higher in RAS system than that in BFT system.RAS system is slightly better than BFT system in water quality control.

关 键 词：RAS BFT 罗非鱼(Oreochromis niloticus) 大规格鱼种 

分 类 号：S953.9[农业科学—水产养殖]