一、前言草鱼是淡水养殖的主要对象之一,其特点是以草为食,食物链短,饲料来源广泛,生长速度快,肉嫩味鲜,经济价值高,无论池塘、湖泊、水库等养殖水体,草鱼均能显示其增产性能。商品鱼基地有较充裕的饲料地,种草养鱼,采取以草鱼为主的养殖方式是比较恰当的。因而草鱼种是商品鱼基地高产不可缺少的物质基础。但草鱼病多,成活率低,草鱼种的生产往 I. INTRODUCTION Grass carp is one of the main objects of freshwater aquaculture. It is characterized by grass feeding, short food chain, wide source of feed, fast growing speed, tender and delicious taste, high economic value, no matter in ponds, lakes, reservoirs and other aquaculture water , Grass carp can show its stimulation performance. Commodity fish base has ample feed, grass and fish, to take the grass-based farming methods is more appropriate. Grass carp species is therefore an essential commodity base for high-yielding material base. However, grass carp disease and more survival rate is low, grass carp production to