The presence and transformations of nitrogen (N) in the environment depend on a variety of environmental factors but are also strongly influenced by anthropogenic activities such as modern agriculture. Understanding N transformations within the context of agricultural systems is crucial for efficient use thereof. The aim of this study was to investigate the changes in concentration of N forms (ammonium, nitrite, nitrate and organic N) within an aquaponic system, a modern agricultural system, in order to obtain insights into environmental pressures influencing N transformation processes. By measuring the concentrations of the individual N compounds, complemented by the determination of abiotic parameters and other relevant nutrients within the system water at 13 sampling points, significant differences between compartments that build up an aquaponic system could be demonstrated. These differences were attributed to individual microenvironments specific to the aerobic loop, anaerobic loop and radial flow settler as a connection between the two, shaping the microbial processes within the aquaponic system.

环境中氮（N）的存在和转化取决于多种环境因素，但也受到人为活动（例如现代农业）的强烈影响。在农业系统的背景下了解氮的转化对于有效利用氮至关重要。这项研究的目的是调查现代农业系统水培系统中N形态（铵，亚硝酸盐，硝酸盐和有机N）的浓度变化，以了解影响N转化过程的环境压力。通过测量各个N化合物的浓度，并辅之以确定13个采样点处系统水中的非生物参数和其他相关营养素，可以证明构成一个水培系统的隔室之间存在显着差异。这些差异归因于有氧环，厌氧环和径向流沉降器特有的个别微环境，两者之间是相互联系的，从而塑造了水培系统中的微生物过程。