氨是海洋和淡水鱼类的主要排泄产物，在水产养殖中，非离子态氨的聚积会对鱼类等养殖生物造成毒害，严重的会造成死亡。水体中氨氮含量的测定是水质分析的重要组成部分。 ｌ.鱼类的排泄率 鱼类的氮排泄物主要有氨、尿素和尿酸，对海水和淡水鱼类来说，氨都是最主要的排泄物，硬 Ammonia is a major excretory product of marine and freshwater fish and in aquaculture, the accumulation of non-ionic ammonia can poison cultured organisms such as fish and cause serious death. Determination of ammonia nitrogen in water is an important part of water quality analysis. l. Fish excretion rate Fish excretion of nitrogen are mainly ammonia, urea and uric acid, ammonia and marine fish are the most important excrement, hard