4.怎样培育鲢、鳙鱼的大规格鱼种?答:夏花以后的鲢、鳙鱼种,仍以浮游生物为主要食物。为了节省饵料,降低生产成本,应以施肥培养浮游生物的办法来培育它们。鱼池里施肥以后,一部分分解为有机腐屑,供鲢、鳙鱼直接食用;另一部分被细菌分解为无机盐类,可大 4. How to breed silver carp, bighead carp big fish? A: Summer flowers after silver carp, bighead carp species, still plankton as the main food. In order to save food and reduce production costs, plankton should be cultivated by fertilizing and cultivating them. Fish pond after fertilization, part of the decomposition of organic decay for silver carp, bighead carp direct consumption; the other part of the bacterial decomposition of inorganic salts, can be large