渔业是新时期实现乡村振兴的重要途径.广西是水库移民大省(份),大化是广西库区水面资源最丰富的渔业大县和移民大县,渔业是库区移民收入的主要来源.以大化县为典型,对大化县库区渔业发展现状进行了实地调研,分析提出大化库区渔业存在总体发展水平低、养殖品种不合理、产业化市场化水平低以及缺乏特色品种和特色品牌等广西其他水库普遍存在的问题,结合当前我国乡村振兴背景及水产养殖业发展新政策新趋势和大化库区实际条件,提出今后大化库区渔业的发展思路是坚持高质量可持续发展,发展策略是打造生态养殖模式和地方特色品牌,重点发展大水面增养殖和拦网养鱼、开发地方特色名优鱼类、生产高端生态鱼和有机鱼.同时还提出了大化库区渔业发展的具体措施,即职能部门和养殖户转变观念,加强水产品品牌认证、品牌建设和无公害示范基地建设,推广健康养殖技术和生态养殖模式,调整品种结构和养殖方式,形成特色渔业及其产业布局,从产、供、销三方面实施渔业产业化等.

Objective This research estimated the cage culture capacity of Guangxi Dahua Yantan reservoir in order to provide theoretical bases for elaborating the developmental plan of Yantan reservoir fishery.Method From March 2010 to July 2011,11 sampling spots from the Dahua Yantan reservoir were investigated and relevant samples were collected through the analysis of the corresponding nutrient limiting factors,including nitrogen content and phosphorus content.The reservoir cage culture carrying capacity model was built on the basis of the Dillon-Rigler model for estimating the cage culture capacity in Dahua Yantan reservoir area.Result Phosphorus was the main nutrient limiting factor.Guangxi Dahua Yantan reservoir's water phosphorus bearing capacity was 528 t.The maximum cage-culture capacity for culturing tilapia and channel catfish were 32393 and 23250 t,respectively,and the corresponding cage-culture areas(S) were 431907 and 33214 m2,respectively.Relevant cage culture breeding capacity were 6.7 and 5.2‰ respectively.Conclusion Guangxi Dahua Yantan reservoir had large cage culture breeding capacity,therefore it was suitable for feeding cage-culturing,but due to the reservoir's high water velocity and relatively small area,the cages must be reasonably arranged to prevent local area eutrophication.