【摘要】 氨氮是水产养殖中备受关注的重要水质指标。由于水产生物高密度养殖模式的普及，养户为追求高产盲目投苗、投料，导致了排泄物、残饵、藻类、菌体于水环境的超量累积，进而诱发蛋白分解，氨氮超量。从而产生氨氮胁迫，养殖减产失收，制约水产养殖。因此，对水中氨氮浓度进行实时监测并做好应对措施尤为重要。最为简易常用的是纳氏试剂分光光度法。对影响纳氏试剂分光光度法测定氨氮结果准确性的因素、纳氏试剂的制备及保存、显色条件、水样分析时的注意事项等进行归纳总结，以便更好的指导实际日常工作。科学有效地管理养殖水质、将氨氮控制在合理的水平，有助于水产养殖业得到更好的发展。更多还原

【Abstract】 Ammonia nitrogen is an important water quality index in aquaculture.Due to the popularity of high-density aquaculture mode, farmers blindly throw seedlings and materials in pursuit of high yield, which leads to excessive accumulation of excreta, bait residue, algae and bacteria in the water environment, and then induce protein decomposition and ammonia nitrogen excess.Produce ammonia nitrogen stress, aquaculture production loss, restrict the development of aquaculture.Therefore, real-time monitoring of ammonia nitrogen concentration in water and countermeasures are particularly important.The most classical, simple and practical method is Nessler reagent spectrophotometric.In this paper, the important influencing factors of spectrophotometric determination of ammonia nitrogen with Nessler’s reagent are summarized: preparation and preservation of Nessler’s reagent, color conditions, matters for attention in water sample analysis, etc.,so as to better guide the practical daily work.Scientific and effective management of aquaculture water quality and control of ammonia nitrogen at a reasonable level are conducive to better development of aquaculture industry.更多还原