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为探究凡纳滨对虾-金钱鱼-蕹菜综合养殖模式中不同金钱鱼规格和密度对养殖效果和氮磷利用的影响,在21个室外水泥池(5 m×3 m×1.2 m)中,开展3×2的双因素实验,即设置3种金钱鱼放养密度(1、2和3尾/m2)与2种金钱鱼规格(10.0与30.0 g/尾)组合的组为实验组,对虾单养组作为对照。实验过程中保持不换水以及相同饲料投喂量。结果表明,与对虾单养组相比,该养殖模式可将对虾的存活率提高1.9%~13.6%,养殖总产量和总饵料系数均显著改善(P<0.05);综合养殖系统对饲料中氮和磷的利用率范围分别为44.4%~62.5%和19.4%~29.1%,显著高于单养池的26.7%和8.2%(P<0.05)。最佳的金钱鱼养殖规格和密度为30.0 g/尾、2尾/m2或3尾/m2。
In order to explore the effects of different size and density of cashmere on the breeding effects and the use of nitrogen and phosphorus in the shrimp culture of Litopenaeus vannamei, A 3 × 2 two-factor experiment was conducted, in which experimental groups were set up with three stocking density (1, 2 and 3 tail / m2) and two kinds of money fish specifications (10.0 and 30.0 g / tail) Yang group as a control. During the experiment do not change the water and feed the same amount of feed. The results showed that compared with shrimp monoculture group, the model could increase the survival rate of shrimp by 1.9% ~ 13.6%, and the total production and the total feed conversion coefficient significantly improved (P <0.05) And phosphorus utilization rates ranged from 44.4% to 62.5% and 19.4% to 29.1%, respectively, significantly higher than 26.7% and 8.2% (P <0.05) of monoculture ponds. The best money fish farming specifications and densities are 30.0 g / tail, 2 / m2 or 3 / m2.