Non-methane hydrocarbons (NMHCs) are vital to people's health and plants' growth, especially inside a controlled ecological life support system (CELSS) built for long-term space explorations. In this study, we measured 54 kinds of NMHCs to study their changing trends in concentration levels during a 4-person-180-day integrated experiment inside a CELSS with four cabins for plants growing and other two cabins for human daily activities and resources management. During the experiment, the total mixing ratio of measured NMHCs was 423 ± 283 ppbv at the first day and it approached 2961 ± 323 ppbv ultimately. Ethane and propane were the most abundant alkanes and their mixing ratios kept growing from 27.5 ± 19.4 and 31.0 ± 33.6 ppbv to 2423 ± 449 ppbv and 290 ± 10 ppbv in the end. For alkenes, ethylene and isoprene presented continuously fluctuating states during the experimental period with average mixing ratios of 30.4 ± 19.3 ppbv, 7.4 ± 5.8 ppbv. For aromatic hydrocarbons, the total mixing ratios of benzene, toluene, ethylbenzene and xylenes declined from 48.0 ± 44 ppbv initially to 3.8 ± 1.1 ppbv ultimately. Biomass burning, sewage treatment, construction materials and plants all contributed to NMHCs inside CELSS. In conclusion, the results demonstrate the changing trends of NMHCs in a long-term closed ecological environment's atmosphere which provides valuable information for both the atmosphere management of CELSS and the exploration of interactions between humans and the total environment.

非甲烷碳氢化合物（NMHC）对人们的健康和植物的生长至关重要，特别是在为长期太空探索而建立的受控生态生命支持系统（CELSS）内部。在这项研究中，我们测量了54种NMHC，以在CELSS内进行的4人180天综合实验中研究其浓度水平的变化趋势，该实验具有四个用于植物生长的小室，另外两个用于人类日常活动和资源管理的小室。在实验过程中，第一天测得的NMHC的总混合比为423±283 ppbv，最终接近2961±323 ppbv。乙烷和丙烷是最丰富的烷烃，它们的混合比最终从27.5±19.4和31.0±33.6 ppbv增长到2423±449 ppbv和290±10 ppbv。对于烯烃，乙烯和异戊二烯在实验期间呈连续波动状态，平均混合比为30.4±19.3 ppbv，7.4±5.8 ppbv。对于芳烃，苯，甲苯，乙苯和二甲苯的总混合比从最初的48.0±44 ppbv下降到最终的3.8±1.1 ppbv。生物质燃烧，污水处理，建筑材料和植物都为CELSS内部的NMHC做出了贡献。总之，结果证明了在长期封闭的生态环境中，NMHCs的变化趋势，这为CELSS的大气管理以及探索人类与整个环境之间的相互作用提供了有价值的信息。苯，甲苯，乙苯和二甲苯的总混合比从最初的48.0±44 ppbv下降到最终的3.8±1.1 ppbv。生物质燃烧，污水处理，建筑材料和植物都为CELSS内部的NMHC做出了贡献。总之，结果证明了在长期封闭的生态环境中，NMHCs的变化趋势，这为CELSS的大气管理以及探索人类与整个环境之间的相互作用提供了有价值的信息。苯，甲苯，乙苯和二甲苯的总混合比从最初的48.0±44 ppbv下降到最终的3.8±1.1 ppbv。生物质燃烧，污水处理，建筑材料和植物都为CELSS内部的NMHC做出了贡献。总之，研究结果表明了NMHCs在长期封闭的生态环境中的变化趋势，这为CELSS的大气管理以及探索人类与整个环境之间的相互作用提供了有价值的信息。