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长期以来,我国大宗淡水鱼面临着养殖品种退化、养殖效益低下等问题,严重挫伤了广大基层养殖户的积极性,常规鱼养殖面积日益萎缩。国家大宗淡水鱼产业
For a long time, China’s large freshwater fish are facing problems such as the degradation of cultured breeds and low breeding efficiency, seriously dampening the enthusiasm of grassroots farmers, and the conventional fish farming area is shrinking day by day. National bulk freshwater fish industry