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研究了饲料中添加凹土(0.0%、0.5%、1.0%、2.0%、4.0%和8.0%)对凡纳滨对虾(1.04～1.06g)存活和生长的影响。实验在淮海工学院江苏省海洋生物技术重点建设实验室进行,凡纳滨对虾(Litopenaeus vannamei)幼虾购自海南某育苗场;实验采用单因子6水平设计,每个水族箱放养10尾对虾,每个水平设3个重复。实验前停食24h,称其初始体重。日投饵2次,过量投饵;投饵2.5h后从每个水族箱收集残饵、粪便和虾壳。实验周期30d。所得数据用单因素方差分析和Turkey′s多重比较进行处理。结果表明,饲料中添加凹土显著地影响对虾的特定生长率,而对存活率、摄食量、饲料系数和吸收效率的影响不显著;在2.0%凹土水平,凡纳滨对虾的特定生长率显著高于0.0%凹土水平,但与其它处理差异不显著;总的看来,2.0%凹土添加组对虾的饲料系数低于其它处理,而摄食量高于其它处理。
The effect of adding attapulgite (0.0%, 0.5%, 1.0%, 2.0%, 4.0% and 8.0%) to the survival and growth of Litopenaeus vannamei (1.04-1.06 g) was studied. Experiments were carried out in Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology. Litopenaeus vannamei juveniles were purchased from a nursery in Hainan. The experiment was designed on a single-factor 6 level with 10 shrimp per aquarium. Set 3 repeats for each level. Stop eating 24h before the experiment, said the initial weight. Feed twice a day, over-feeding; bait was collected from each aquarium 2.5h after feeding, feces and shrimp shell. Experimental period 30d. The data obtained were processed using one-way ANOVA with Turkey’s multiple comparisons. The results showed that the addition of attapulgite significantly affected the specific growth rate of shrimp, but had no significant effect on the survival rate, feed intake, feed efficiency and absorption efficiency. At the 2.0% level, the specific growth rate of shrimp Litopenaeus vannamei Which was significantly higher than 0.0% of the attapulgite, but not significantly different from other treatments. Overall, the feed efficiency of 2.0% attapulgite was lower than that of other treatments, but the food intake was higher than other treatments.