一、种植养殖轮作新建的鱼池中很少存在易感染鱼类疾病的病原体,因而鱼病很少发生,而老鱼池则相反,鱼类易发病。因此建鱼池时,应多建几个鱼池。今年在这个鱼池养鱼,而用另一个鱼池搞种植,第二年交换轮作。由于鱼的易感病原体对植物不感染,而植物的易感病原体对鱼类不感染,因此 First, the cultivation of cultured round of newly built fish ponds rarely exist in the pathogens susceptible to fish diseases, so rarely occur fish diseases, while the old fish ponds on the contrary, the fish vulnerable to disease. Therefore, when building fish ponds, should build more fish ponds. This year in this fish pond fish, but with another pond planted, the exchange of rotation the following year. As the susceptible pathogens of fish do not infect plants and the susceptible pathogens of plants do not infect fish,