1.培育大规格鱼种:大规格鱼种能够逃避敌害,长得快,产量高。水库养鱼放养鱼种,至少3寸长。池塘养鱼放养大规格鱼种,成本低、见效快,能缩短养殖周期。鲤鱼当年可育成半斤重的商品鱼。采取稀放精养的办法,当年鲢鳙秋片可达5寸左右,第二年春放、秋捕,能养成1斤以上的商品鱼。培育大规格鱼种,首先要抓好 1. Cultivate large-scale species: Large-size species can evade enemy predators, grow fast, high yield. Fish stocking fish, at least 3-inch long. Pond fish stocking large size species, low cost, quick, can shorten the breeding cycle. Carp can be bred into half a catty of commercial fish. Rare and intensive approach to take, then the silver carp and autumn fall up to about 5 inches, the second year in spring, autumn catch, can develop more than 1 kg of fish. Cultivate large-scale species, we must first do a good job