银川地区饲养温水性鱼类达到商品鱼规格,约需三年左右,甚至四年。饲养周期长,成鱼产量低,成本高,经济效益低于其它养殖业。所以,缩短商品鱼类饲养周期,提高池鱼产量,就成为当前迫切需要解决的实际问题。目前缩短鱼类饲养周期(或生长周期)的办法大致有二:一是利用控温设施繁殖鱼苗, Yinchuan feeding warm water fish reach commodity specifications, about three years or even four years. Feeding cycle is long, adult fish production is low, the cost is high, the economic benefit is lower than other aquaculture. Therefore, shortening the breeding cycle of commercial fish and raising the production of fish ponds has become an urgent practical problem to be solved. The current shortening of fish feeding cycle (or growth cycle) approach roughly two: First, the use of temperature control facilities breeding fry,