池塘主养草鱼种高产试验

在３００５ｍ＾２的池塘里，高密度培养大规格草鱼种，且塔养鲢，鳙，鲤种。采取的技术措施是：草鱼种入池先喂芜萍，２０天后改喂浮萍并驯喂粗蛋白含量较高的小颗粒配饵。草鱼种长到１０ｃｍ后，改喂粗蛋白含量较低的配饵；定期注入新水，增氧，泼洒药物，投喂药饵，高温季节，使池水保持长流水。结果：共产草鱼种５０３２ｋｇ，平均规格８０．１ｇ；鲢鳙鱼种２６６０．６ｋｇ，鲤种５３６．３ｋｇ，纯利４８９２８．６元，投入产出

High-yield Pond Culture Experiment of Grass Carp Fingerling

In the pond of 3005m2, large-sized fingerlings of grass carp were reared at high density as the major species, the minor species were silver carp, bighead carp and common carp. The main managements were as follows:The fingerlings of grass carp were fed on Wolffia arrhiza after stocking and common duckweed lemma minor L. 20 days after,at the same time,a high crude protein granular diet was also used,by which increase the growth and strenthen the ability of disease-prevention. After the fingerlings reached 10cm,decreased the content of the crude protein to decrease the cost. Exchanged water reqularly, aerated with aerator,splushed medicine solution,fed on drug feed,kept the water flowing during the high temperature days. In this case,the yield of grass carp fingerling was 5032 kg,the average size was 80. lg,the yield of silver carp and bighead carp was 2660. 6kg,common carp 536.3kg,the total yield of fingerling was 8228kg,net profit was 48928. 6 yuan,the input-output ratio was 1: 2. 09.