天津市宝坻县目前已有44000亩养殖水面,养殖产量已达2万吨,品种上主要以吃食性的鲤鱼、鲫鱼为主。从生产上看,以鲤鱼为例,其饵料系数一般为2左右,生产1kg 鱼,仅饵料成本就需4元,加上池塘承包费、水电费、鱼病防治费等,每公斤鱼成本起码在5元左右,近年来水产养殖病害发生频繁,水产品价格持续走低,渔业效益下滑严重,有的养殖户有时连 Baodi County, Tianjin currently has 44000 acres of aquaculture water, aquaculture production has reached 20,000 tons, the main varieties of food-eating carp, crucian-based. From the production point of view, the carp, for example, the feed coefficient is generally about 2, the production of 1kg fish, bait costs only 4 yuan, plus pond contracting costs, utilities, fish disease prevention and control costs per kilogram of fish at least In about 5 yuan, frequent aquaculture diseases in recent years, the price of aquatic products continued to decline, the decline in fishery benefits serious, and some farmers sometimes