稻田养鱼,成本低,效益好,管理方便。实行稻鱼兼作是稻谷增产鱼高产的一种形式,为搞好稻鱼双丰收,提高稻鱼的经济效益,在实践中,必须做到七注意:一、注意鱼种规格。据一些养鱼户反映,亩投放鱼种数量很多,但结果成活率却很低。主要原因是鱼种规格小,抗逆性差,易被蛇、蛙等吃掉。因此投放的鱼苗,以3～4市寸的规格 Paddy fish, low cost, good efficiency, easy management. The implementation of rice and rice as an additional yield of high-yielding fish in a form of paddy, to do a good job in double-harvest rice and improve the economic benefits of rice, in practice, we must do seven notices: First, pay attention to fish specifications. According to some fish farmers, there are many species of fish put into the mu, but the survival rate is very low. The main reason is the small size of fish species, poor resistance, easily eaten by snakes, frogs and so on. Therefore put the fry to 3 to 4 inch size specifications