循环水系统养殖杂交石斑鱼的运行效果Analysis of Water Treatment in Recirculation Aquaculture System with Hybrid Grouper Culture
赵骏凯,张健东,陈刚,汤保贵,王忠良,黄建盛
摘要(Abstract):
【目的】研究养鱼池、微滤机、臭氧-蛋白质分离器、生化过滤器组成的循环水系统对杂交石斑鱼的养殖效果。【方法】利用低密度(200尾/池)珍珠龙趸养殖的自然微生物对循环水系统进行生物挂膜30 d,使用循环水养殖系统养殖体质量(270.5±4.5)g的杂交石斑鱼[Epinephelus fuscoguttatus (♀)×Epinephelus lanceolatus (♂)](下称"珍珠龙趸")60 d,放养密度2 000尾/池,以相同放养量相同养殖池的流水养殖系统作对照。监测循环水养殖系统的挂膜效果,测定循环水养殖系统和流水养殖系统的氨氮、亚硝酸盐、硝酸盐、化学需氧量、悬浮固体粒子等指标,测定珍珠龙趸的生长状况。【结果】循环水养殖系统生化过滤器内部滤料出现附着菌膜,水质变化趋于稳定,挂膜状况良好,养殖期系统出水氨氮、亚硝酸盐、化学需氧量、固体粒子质量浓度均显著低于流水养殖池(P <0.05),去除率分别为65.93%、48.51%、39.92%、80.61%;经60 d养殖,循环水养殖珍珠龙趸存活率89.25%,养殖密度达35.10 kg/m3,体质量(491.7±16)g,增重率62.23%,特定生长率0.82%,饲料系数1.16,而流水养殖珍珠龙趸存活率88.15%,养殖密度为32.16 kg/m3,体质量(446.4±19) g,增重率48.48%,特定生长率0.71%,饲料系数1.27。【结论】循环水养殖系统水处理效果显著,珍珠龙趸养殖效果良好。
关键词(KeyWords): 循环养殖系统;生化过滤器;水处理效果;杂交石斑鱼;褐点石斑鱼;鞍带石斑鱼
基金项目(Foundation): 广东省科技厅专项(2016B020201009);; 省海洋创新区域示范专项(GD2012-A02-003);; 省部产学研结合项目(2013B090700010);; 教育厅重点实验室项目(2013CXZDA019);教育厅教学、科研创新团队项目(524000070、002024008);; 创新强校研究生基地项目(GDOU521004002、GDOU521006010001);; 阳江科技局项目(2016024)
作者(Author): 赵骏凯,张健东,陈刚,汤保贵,王忠良,黄建盛
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