传统养鱼,从鱼苗养成食用鱼的周期,一般鲢鱼、鳙鱼、鲤鱼、鲫鱼、鳊鱼需要2年时间,青鱼、草鱼需要3—4年。由于生长周期长,致使饵料效率低,生产环节多,管理费用大,成本高。近年来,一些科研部门从鱼类个体的摄食生长能力和各种鱼混放轮养等群体间的关系着眼,反复进行了面广量大的对比试验,说明了鱼苗养成食用鱼的周期,完全可以缩短1—2年,其中大多数养殖鱼类的鱼苗,当年就能养成食用鱼。其主要技术是: The traditional fish culture, fish food from raising fish cycle, the general silver carp, bighead carp, carp, crucian carp, mackerel takes 2 years, bluefish, grass carp takes 3-4 years. Due to the long growth cycle, resulting in low efficiency of food, production processes, management costs, high cost. In recent years, some research departments focus on the relationship between the feeding capacity of individual fish and various groups such as mix-and-place rotation of fish, and repeatedly conducted large-scale and large-scale comparative experiments to illustrate the cycle in which fish grow into food fish, Can be shortened 1-2 years, most of which fish farming fishes, that year will be able to develop food fish. Its main technology is: