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为探索河蟹人工育苗中的水质净化和减少换水量的方法,通过基础试验和河蟹人工育苗生产性试验,对一种生物组合技术进行了研究考察。结果表明,依据生态养殖原理设计,在养殖池内投放和接触氧化水循环处理装置内接种挂膜光合细菌、硝化细菌和放线菌等环境有益微生物,并与微藻、光合细菌等活饵料应用技术相结合的成套技术可使育苗池水循环利用,降低生产成本,减少对周边水环境的污染。试验苗池DO高于7.5mg/L,NH3-N基本低于0.5mg/L,水质明显优于对照苗池,符合河蟹育苗要求。试验苗池蟹苗总成活率19.4％,产量175.8g/m3,蟹苗成活率、产量和质量均明显优于对照苗池,经济效益和环境效益显著。
In order to explore the methods of water purification and reducing water exchange in artificial breeding of crab and crab, a biological combination technique was investigated through the basic test and the productive experiment of artificial breeding of crab. The results showed that in accordance with the principle of ecological farming design, environmental friendly microorganisms such as photosynthetic bacteria, nitrifying bacteria and actinomycetes were inoculated in the culture pond and put into contact with the oxidized water circulation treatment device, and were used with the live bait technology such as microalgae and photosynthetic bacteria Combined with a complete set of technologies can recycle seedlings pool water, reduce production costs and reduce the pollution of the surrounding water environment. The DO of test seedlings was higher than 7.5mg / L, while that of NH3-N was lower than 0.5mg / L. The water quality was obviously better than that of control seedling ponds. The total survival rate of test seedlings pool crabs 19.4%, yield 175.8g / m3, crab seedling survival rate, yield and quality were significantly better than the control seedlings pool, significant economic and environmental benefits.