微孔曝气增氧技术在鳗鲡养殖中的应用

比较研究了鳗鱼养殖中应用微孔曝气增氧与水车式增氧机增氧两种方式的增氧效果.结果表明：在未载鱼情况下,两种增氧方式的增氧能力具有极显著性差异（P〈0.01）,微孔曝气增氧方式比水车式增氧机增氧方式的单位水体增氧能力提高了15.85%,增氧动力效率是水车式增氧机增氧的2.36倍.在载鱼养殖情况下,使用微孔曝气增氧的试验池表层水的平均溶解氧值显著低于使用水车式增氧机增氧的值（P〈0.05）,但底层水的溶解氧两者没有显著差异（P〉0.05）,且溶解氧值都大于5 mg/L.微孔曝气增氧方式单位养殖水体的用电量比水车式增氧机增氧节省57.6%,且无安全隐患.由于微孔曝气增氧池水的流动性小,鱼类活动消耗的能量减少,且水温较高,因此,使用微孔曝气增氧方式的鳗鲡养殖效果较好.

Application of the Micropore Aeration Technique in Eel Culture

The trials on the aeration efficiency in eel culture between the micropore aerators and the waterwheel aerators were carried out.The results showed that there was significant difference in the aeration efficiency between the ways of aeration under unloading fish.The aeration capacity of the micropore aerator was 15.85 % higher than that of the waterwheel aerator,and the aeration efficiency of the former was 2.36 time that of the latter.Under the case of loading fish,the average dissolved oxygen（DO） concentration by the micropore aerator was significant lower than that by the waterwheel aerator,but the DO concentrations all above 5 mg/L were not significantly different in the bottom water between the aeration ways.Using micropore aerator could save 57.6 % electricity and was much safer than using waterwheel aerator.The eels grew much faster in the pools using micropore aerator than those in the pools using waterwheel aerator.