放养制度与鱼种生产一样,都属于养殖基础科学范畴,它所包含的内容也比较广泛。这里所讨论的主要指鱼种放养技术的改革。重点讨论鱼种放养及养殖周期、“稀放”精养及多品种混养、“二级放养”解决大规格鱼种来源及轮捕轮放等。我区养鱼历史较短,单产低。其原因除了气候、水情、坑塘条件、技术水平等客观因素较差外,在放养制度上确也存在不少问题,方法比较简单。大量的是属于一次放 The stocking system, like the production of fish species, belongs to the basic science of aquaculture and contains a wide range of content. The main discussion here refers to the reform of stocking technology. Focuses on species stocking and breeding cycle, “dilute” intensive and multi-species polyculture, “second-class stocking” to solve the source of large-scale species of fish and the wheel and wheel and so on. My area has a short history of fish farming, low yields. The reasons for this include not only poor objective factors such as climate, water conditions, pit conditions and technical level, but also quite a few problems in the stocking system. The method is relatively simple. A lot of belong to a release