A theoretical model to evaluate total ammonia concentration in recirculating aquaculture system was established by investigating the relationship between impact factors of total ammonia.Subsequently,a system dynamics model for total ammonia in the recirculating aquaculture system was developed based on the theoretical model.The dynamics of total ammonia concentration in a culture pond during the breeding process was simulated by using STELLA simulation software.The simulation results were consistent with the measured values approximately,indicating that this model could simulate the experimental system to a certain extent and could provide suggestions on design and operation of the recirculating aquaculture system.%通过对影响循环水养殖系统养殖池塘中总氨氮动态的各种因素及其因果关系的分析,得出了养殖池塘中总氨氮的理论模型.在理论模型基础上,使用STELLA系统动力学模拟软件建立了循环水养殖实验系统中池塘水体总氨氮的系统动力学模型.通过将系统设计和运行的相关参数代人到该模型中,对养殖过程中池塘中总氨氮的动态变化进行了模拟运算,模拟结果与实测值基本吻合,说明该模型对实验系统的模拟具有一定的可信度,可为循环水养殖系统的设计和运行优化提供依据.
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