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设计制作了“双层底”、带有净化槽的循环水海参养殖系统,研究了不同换水方式下该系统除氨氮的效果,为海参自净式工厂化养殖模式的建立提供依据。结果表明,在加入硝化细菌后,高密度、短周期换水养殖其硝化系统建立比低密度、长期不换水时快。短周期换水养殖在硝化系统稳定后,氨氮与实验初始和峰值相比分别减少63.9%和75.3%,每个水循环平均除氨率为14.2%;长周期换水养殖在硝化系统稳定后,氨氮与初始和峰值时相比分别减少35.9%和86.8%,每个循环平均除氨率为13.6%。2种养殖方式中,氨氮和亚硝酸盐最终均能保持在安全范围内,海参的成活率分别为100%与95%。
Design and manufacture of “double bottom” circulating water aquaculture system with decontamination tank. The effect of ammonia removal in this system was studied under different water exchange modes, which provided the basis for the establishment of self-purifying factory farming mode of sea cucumber. The results showed that after adding nitrobacteria, the nitrification system of high density and short cycle aquaculture was established faster than that of low density and not changing water for a long time. After the nitrification system stabilized, ammonia nitrogen decreased by 63.9% and 75.3% compared with the initial and peak values, respectively, and the average ammonia removal rate per water cycle was 14.2%. After long-term aquaculture, 35.9% and 86.8% less than the initial and peak values, respectively. The average ammonia removal rate per cycle was 13.6%. Of the two breeding methods, ammonia nitrogen and nitrite eventually maintained within the safe range, sea cucumber survival rates were 100% and 95%.