一般养鱼周期,花白鲢、鲤鱼、鳊鱼需要2年时间,草鱼、青鱼需要2—3年,生长周期长,饵料效率低,生产环节多,管理费用大,饲养成本高,经济效益差。若采取综合措施,即可缩短养鱼周期,将鱼苗当年养成商品食用鱼,花白鲢、鲤鱼、草鱼、青鱼养成1斤以上,鲫鱼、团头鲂、罗非鱼半斤左右,亩净产800—1000斤,高的 The general fish farming cycle, silver carp, carp, catfish takes 2 years, grass carp, herring need 2-3 years, long growth cycle, low efficiency of food, many production processes, management costs, high cost, poor economic efficiency. If take comprehensive measures, you can shorten the period of fish farming, fish fry that year to develop commercial food fish, silver carp, carp, grass carp, black carp to develop more than 1 kg, crucian carp, bream, tilapia about half a catty, Produce 800-1000 pounds, high