Abstract: In production of Litopenaeus vannamei of industrial recirculating aquaculture, for aquaculture of shrimp smaller than 4cm, the recirculating model has obvious defects. It is easy to block the drain filter, the shrimp fails to take food effectively and water quality worsens. In this research, in combination with theories and research results about application of bio-floc to aquaculture at home and abroad, bio-floc is used to control water quality in juvenile shrimp feeding stage, and technical key points including floc formation time, type of carbon source added, volume of addition and adding mode are studied preliminarily; after 25 d of no water change, the survival rate of juvenile shrimp is 72.8%, and individuals are uniform. The research shows that the use of floc-based aquaculture model in the early stage shrimp bleeding can effectively solve such problems as uneven growth of juvenile shrimp in recirculating aquaculture system and low survival rate, and improve the overall success rate of shrimp in industrial recirculating aquaculture model.

Key words: Bio-floc, recirculating aquaculture, industrial aquaculture

摘要： 工厂化循环水养殖南美白对虾生产中，在饲养小于4 cm的对虾苗养殖时，循环水模式存在明显的缺陷，容易出现堵塞出水管过滤网、虾苗无法有效摄食以及水质恶化等方面的问题。本研究结合国内外生物絮团用于水产养殖的理论和研究成果，在幼虾饲养阶段采用生物絮团控制水质的养殖方法，对絮团形成时间、添加碳源种类、添加量、添加方式等技术关键点开展初步研究，在25 d标苗期全程不换水，幼虾存活率72.8%，且个体均匀。研究表明，在标苗阶段改用基于絮团的养殖模式，能有效解决循环水养殖系统中幼虾生长不均匀，存活率低等问题，提高工厂化循环水养虾的总体成功率。

关键词: 生物絮团, 循环水养殖, 工厂化养殖