淡水池塘主养鲈试验

报道了首次利用淡水鱼塘，主养鲈兼养鲢，鲤，草鱼等试验，每亩放苗５１５尾，鲈占放养总重的７１．７％；主喂冷冻青鳞鱼，约占７７．７％，辅喂人工配饵；前期只充渗漏水，中后期透明度小于３０ｃｍ时，大量换水。结果：共产商品鱼８８０２ｋｇ，其中鲈３７４０ｋｇ，折合亩产１２４．７ｋｇ，成活率８９％。总产值１２８０４６．８地，纯利７６９６９．８地，平均亩纯利２５６５元，投入产出比１：２．５。

A Trial Culture of Bass as Main Species in Freshwater Pond

It is the first time to report a trial culture of the bass as a main species together with the silver carp,common carp and grass carp. The stocking numbers per mu is 515 fingerlings, including bass of 71. 7 %, mainly feeding on the frozen trash fish (77.7 % ), supplemented with artificial diet. In the former period of culture the pond was only supplemented with the water to keep the pond water at the original level and in the middle and later period of culture the pond water which transparency was below 30cm,should be greatly changed.The trial result showed: the output of commercial fish totalled 8802kg,including 3740kg of bass. The survival rate was 89 %. The output price was 128046. 8 yuan, net profit76939. 8yuan. The ratio of input and output was 1: 2. 5