微米纯氧气泡增氧技术养殖大菱鲆效果初探

The preliminary research of the technique and effect of micron oxygen aeration in turbot farming

试验旨在分析新型微米纯氧气泡增氧养殖大菱鲆的效果。试验采用微米纯氧气泡增氧和机械增氧2种方式，设置机械增氧组（溶解氧6～9mg／L）、微米纯氧增氧Ⅰ组（溶解氧6～9mg／L）和微米纯氧增氧Ⅱ组（溶解氧15—20mg／L）3个试验组。结果表明，微米纯氧Ⅰ组大菱鲆的体重增长、成活率、肥满度及饵料转化率高于机械增氧组；微米纯氧Ⅱ组各指标低于机械增氧组。7个月的大规模生产试验（800m^2水面，溶解氧6—9mg／L）表明，采用微米纯氧气泡增氧养殖大菱鲆，各测定指标均显著高于机械增氧，可以加快大菱鲆生长，提高成活率和饵料转化率。

Effect of micron pure oxygen in turbot （Scophthalmus maximus） farming was determined in this study. The facilities of air aeration and micron pure oxygen （diameter of oxygen bubble was from 10 μm to 100 μm） were used. Three treatments, including air aeration （6 -9 mg/L）, pure oxygen Ⅰ （6 -9 mg/L） and pure oxygen Ⅱ（ 15 - 20 mg/L）, were designed. Growth rate, survival rate and feed translation rate （FCE） were measured. The results indicated that, when dissolved oxygen concentration varied from 6 mg/L to 9 mg/L, turbots in micron pure oxygen system were higher on growth, survival rate and feed conversion efficiency （FCR） than those of air system; A farming trial was conducted to determine growth difference of turbot between pure oxygen and air system. Length growth, weight growth, survival rate and FCE were better in micron pure oxygen system than air system. The results suggested that micron pure oxygen was better than aeration in turbot farming system when dissolved oxygen concentration was from 6 -9 mg/L.