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当前位置: 首页 > 文章 > 投喂负荷对循环水养殖大西洋鲑生长及氮、磷收支的影响 渔业现代化 2014,41 (2) 1-6
Position: Home > Articles > Effects of feeding load on growth,nitrogen and phosphorus budgets of Atlantic salmon( Salmo salar) in recirculating aquaculture systems Fishery Modernization 2014,41 (2) 1-6

投喂负荷对循环水养殖大西洋鲑生长及氮、磷收支的影响

作  者：
孙国祥;李甍;刘鹰
单  位：
中国科学院海洋研究所;中国科学院大学;中国海洋大学
关键词：
大西洋鲑;循环水养殖;投喂负荷;生长;氮磷收支
摘  要：
为研究封闭循环水高密度养殖[(28.30±0.51)kg/m3]下投喂负荷对循环水养殖大西洋鲑(Salmo salar)生长及氮、磷收支的影响,设置4个投喂负荷:1.2 g/L(A组)、1.8 g/L(B组)、2.4 g/L(C组)、3.0 g/L(D组),挑选体重为(377.5±14.5)g的大西洋鲑进行70 d养殖试验。结果显示,投喂负荷对大西洋鲑生长、系统水质和氮、磷收支均有显著影响(P<0.05)。C组特定生长率(1.05%/d)显著高于A组(77.97%)和B组(56.72%)(P<0.05),饲料系数(0.90)显著低于A组(18.18%)和B组(10.89%)(P<0.05)。C组的总氨氮、磷酸盐和总氮浓度均显著高于A组(P<0.05)。C组的氮沉积率(48.21%)和系统磷输出(73.93%)显著高于A组(52.66%和19.07%)(P<0.05),氮输出(36.07%)显著低于A组(14.85%)(P<0.05)。研究表明,适宜的投喂负荷不仅能促进大西洋鲑生长和对氮、磷等营养素的利用,而且会减少系统氮、磷等污染物的输出,降低系统对环境的影响。
译  名：
Effects of feeding load on growth,nitrogen and phosphorus budgets of Atlantic salmon( Salmo salar) in recirculating aquaculture systems
作  者：
SUN Guoxiang;LI Meng;LIU Ying;Institute of Oceanology,Chinese Academy of Sciences;University of Chinese Academy of Sciences;Ocean University of China;
关键词：
Atlantic salmon(Salmo salar);;recirculatiing aquaculture;;feeding load;;growth;;nitrogen and phosphorus budgets
摘  要：
Effects of feed loading on growth and nitrogen and phosphorus budgets of Atlantic salmon( Salmo salar) were studied in a 70-day experiment in recirculating aquaculture systems. Atlantic salmon with average weight of( 377. 5 ± 14. 5) g were fed by four feeding loads( 1. 2 g / L for group A,1. 8 g / L for group B,2. 4 g / L for group C,3. 0 g / L for group D). The results indicated that feeding loads had significant effects on salmon growth,water quality and nutrient budgets of recirculating aquaculture system( P < 0. 05). The specific growth rate of group C( 1. 05% / d) was significantly higher than group A and B by 77. 97% and 56. 72%( P < 0. 05) respectively,while feed conversion rate( 0. 90) was significantly lower than that in the group A and B by 18. 18% and 10. 89%( P < 0. 05). Concentrations of total ammonia,phosphate and total nitrogen in group C were significantly higher than that in group A( P < 0. 05). The nitrogen deposition rate( 48. 21%) and phosphorus output( 73.93%) for system of group C were higher than that in group A by 52. 66% and 19. 07%( P < 0. 05),whilst nitrogen output( 36. 07%) was lower by 14. 85%( P < 0. 05). The study showed that suitable feeding load can improve growth and nutrients utilization for salmon. It can also reduce environmental impacts of system by reducing output of wastes including nitrogen,phosphorus,etc.

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