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稀土养鱼,能调节鱼体代谢机能,提高鱼类对养料的利用率,使鱼生长加快。稀土还可杀死病菌,提高鱼苗成活率,并刺激水中浮游生物的生长,增加滤食性鱼类饵料。据邵阳县岩口铺镇农技站试验表明:以稀土为主配制的药与常规鱼药比较,草鱼成活率可提高18％左右,饲料效率和蛋白质利用率分别提高5.2％和5％,平均每667平方米水面可增产鲜鱼25～35公斤。对其它鱼类,添加稀土的与未添加稀土的比较,667平方米鲢鱼增产30～40公斤,鲤鱼增产20～25公斤。稀土养鱼的方法有以下几种:
Rare fish, can regulate the metabolism of fish, improve fish utilization of nutrients, so that fish grow faster. Rare earth can kill bacteria, improve the survival rate of fry, and stimulate the growth of plankton in water, increase the filter-feeding fish bait. According to Shaoyou County, Ikouou Town Agronomic Station tests showed that: the preparation of rare earth-based drugs compared with conventional fish drugs, grass carp survival rate can be increased by about 18%, feed efficiency and protein utilization increased by 5.2% and 5%, respectively, the average Each 667 square meters of water can produce 25 to 35 kg of fresh fish. For other fish, add rare earth with no added rare earth comparison, 667 square meters silver carp yield 30 to 40 kg, carp 20 to 25 kg. The methods of rare earth fish are the following: