海洋科学2011，Vol.35Issue(5)：53-60,8.
流速对封闭循环水养殖大菱鲆生长、摄食及水质氮素的影响
Effects of flow rate on the growth, feed intake and water nitrogen in a closed recirculation aquaculture system of turbots (Scophthatmus maximus L.)
摘要
Abstract
Effects of flow rate on the feed intake, growth and water quality of turbot culture were investigated in a closed recirculation aquaculture system. Fish with a mean initial weight of 200.3 g±7.6 g were reared at four different flow rates (200, 400, 600, 800L/h) in 400 L tanks for 42 days. Six hundred and sixty fish were randomly allotted in four treatment groups with three replicates for each treatment at a stocking density of 14.1 ± 0.51 kg/m2. Feed intake, specific growth rate and weight gain rate were increasing rapidly first and then slowly with the increase of flow rate, while food conversion rate showed a reverse pattern. The specific growth rate of group B, C, and D were significantly higher than group A by 30.77%~52.31%, while feed conversion rate ws lower than group A by 13.83%~22.34%. Concentrations of total ammonia nitrogen (TAN), unionized ammonia nitrogen (UIA-N), and nitrite ( NO2 -N) were decreased rapidly first and then slowly with the increase of flow rate. The ammonia nitrogen of group B, C, and D were significantly higher than group A by 53.70%~79.07%. The optimal ecological flow rate was calculated to be 625 L/h, based on the specific growth rate with total ammonia nitrogen in water. Another optimal ecological economical flow rate was calculated to be 480 L/h, based on the specific growth rate with power consumption and TAN in water.关键词
封闭循环水/流速/摄食/生长/水质/大菱鲆(Scophthatmus maximus L)Key words
closed recirculation aquaculture system/ flow rate/ feed intake/ growth/ water quality/ turbot (Scophthatmus maximus L)分类
农业科技引用本文复制引用
孙国祥,李勇,田喆,刘鹰,高婷婷,柳阳,刘佳亮..流速对封闭循环水养殖大菱鲆生长、摄食及水质氮素的影响[J].海洋科学,2011,35(5):53-60,8.基金项目
国家高技术研究发展计划(863计划)重点项目(2006AA 100305) （863计划）
国家农业科技成果转化资金资助项目(2008GB2C 100109) （2008GB2C 100109）
