田 喆^1，2，张延青¹，刘 鹰²，孙国祥²
（1 青岛理工大学，青岛 266033；2 中国科学院海洋研究所，青岛 266071）

摘要：研究了封闭循环水养殖系统中不同循环水率对大菱鲆（Scophthatmus maximus）生长和水质变化的影响。试验设置4个循环水率梯度12，24，36，48次/d，大菱鲆初始平均体重为200.36 g。经43 d养殖，12次/d组大菱鲆最终平均体重为277.98 g/尾，而48次/d组达到了296.24 g/尾；12次/d组水体氨氮（TAN）和亚硝酸盐氮（NO2－-N）浓度分别为0.41~1.50 mg/L和0.12~0.38 mg/L，而48次/d组分别为0.33~0.56 mg/L和0.05~0.09 mg/L。试验结果显示，提高循环水率可降低系统中氨氮和亚硝酸盐氮的积累速度，优化养殖水质，减小水中有害物质对大菱鲆的胁迫作用，从而加快大菱鲆的生长速度，但对化学需氧量（COD）的去除没有显著影响。

关键词：大菱鲆；循环水养殖；水循环率

Impact of different water circulation rate on growth of turbot (Scophthalmus maximus) and water quality
TIAN Zhe ^{1, 2}, ZHANG Yan-qing ¹, LIU Ying ², SUN Guo-xiang ²
( 1 Qingdao Technological University, Qingdao 266033, China;
2 Institute of Oceanology, Chinese Academy of Sciences, Qingdao266071, China )

Abstract: In this paper, the impact of different water refreshment rate on growth of turbot (Scophthalmus maximus) and changes in water quality has been studied. Four different water refreshment rates (200 L/h, 400 L/h, 600 L/h, and 800 L/h) were set, and corresponded 12, 24, 36 and 48 cycles per day, and the initial average weight of turbot was 200.36 g. The growth rate of turbot showed significant difference after 43 days of culture, the average final weight of turbots reared at a flow of 200 L/h was 277.98 g, while it was 296.24 g at a flow of 800 L/h. The TAN and NO2－-N concentrations were decreased significantly with the increased flow rate, which were 0.41-1.50 mg/L and 0.12-0.38 mg/L at a flow rate of 200 L/h and were 0.33-0.56 mg/L and 0.05-0.09 mg/L at a flow rate of 800 L/h. The result showed that increasing water refreshment rate could slow down the TAN and NO2--N accumulation in the system, improve water quality, weaken the effect of harmful substances in water on turbots, thus speeding up the growth rate of turbots, but it had no significant effect on COD removal.

Key words: turbot; recirculating aquaculture system; water refreshment rate

基金项目：国家自然科学基金项目（30972267）
作者简介：田喆（1986—），男，硕士研究生，主要从事水污染控制与处理研究。E-mail: tianzhe0208@163.com
通讯作者：刘鹰（1969—），男，研究员，博士，从事水产工程学研究与应用。E-mail: yinliuiocas@gmail.com

(来源：《渔业现代化》2010.37(6)：1-5)