(一)合理放养鱼种规格鲢、鳙鱼是轮捕轮放的主要品种,不论哪一类型放养模式都需要放它,特别是肥水塘,水体容易富营养化,鲢鱼滤食浮游植物,能有效地控制藻类过量繁殖而形成有害的水华。如果是轮捕轮放的养殖模式,150～200克/尾的大规格鱼种是作为早期轮捕的基础,其放养量约占15% (A) rational stocking species of silver carp, bighead carp is the main variety of round catch rotation, regardless of the type of stocking mode need to put it, especially fertilizer ponds, easy eutrophication of water, silver carp filter feed phytoplankton, Can effectively control the excessive reproduction of algae and the formation of harmful blooms. In the case of the round-robin breeding mode, large-sized species of 150 to 200 g / t of tail are used as the basis for early harvesting and stocking accounts for about 15%