养鱼如同养畜,必须有饲料作保证,有水不等于有鱼,水、料兼有才能有鱼。全用精料养鱼,成本太高,广大农村养不起;种草养鱼投资小,效益高,很有发展前途。草、鳊、鲤鱼主要是吃草的,鲢、鳙鱼是以浮游生物为饵料的,再适当搭配点精料,就可养好这些商品鱼。当然,种草养鱼一定要选好草食性鱼种,同时要根据草料的供应数量确定合理的放养密度和比例。——编者按 Fish as livestock, there must be a feed to ensure that there is water does not mean that there is a fish, water, both materials to have fish. Full use of fine fish, the cost is too high, the vast rural areas can not afford; grass and fish investment, high efficiency, promising future. Grass, shrimp, carp is mainly grazing, silver carp, bighead carp is plankton for the bait, and then with the appropriate point of concentrate, you can keep these commercial fish. Of course, grass-fed fish must be selected herbivorous fish species, at the same time according to the supply of forage to determine the reasonable stocking density and proportion. - Editor’s note