Anthropogenic ground-level ozone (O₃) pollution can alter the phosphorus (P), carbon (C), and nitrogen (N) of terrestrial plants’ ecological stoichiometry, which in turn affects forest productivity, nutrient utilization, and carbon sink capacity. However, there is still quite a lot of uncertainty regarding the impact of high O₃ levels on C-N-P stoichiometry in organs with a rapid turnover (i.e., fine roots and leaves) across varied functional types. This study investigated the effects of O₃ on the stoichiometry of C-N-P nutrient allocation of stocks to various plant organs, with a special focus on tree species frequently employed for urban greening. The impact of O₃ on C-N-P stoichiometry among different functional tree types was subsequently evaluated by reviewing the published literature. Under a pooling of all species, elevated O₃ decreased and leaf C and P concentrations increased, thereby decreasing the leaf C: P ratio. Elevated O₃ increased the N concentration in fine roots, thereby decreasing the C: N ratio, although no significant impact was observed in leaves. Elevated O₃ significantly reduced the leaf stocks of C (CS_leaf) and N (NS_leaf), however, there was no observed variation in these stocks in fine roots. The content of P, C, and N in fine roots and leaves in evergreen broadleaf species exceeded those in deciduous species. Elevated O₃ significantly reduced CS_leaf, NS_leaf, and PS_leaf in deciduous broadleaf species, whereas there was a significant reduction for the same in evergreen species. The literature analysis further demonstrated a larger O₃-induced increment in leaf P concentration in deciduous species as compared to evergreen species. Elevated O₃ significantly increased the difference in C and N stocks between fine roots and leaves in deciduous broadleaf species, whereas this difference was observed to decrease in evergreen species. The results of this study can facilitate an improved understanding of ecological stoichiometric responses of urban greening tree species under O₃ stress and the resulting nutrient use strategies.

人为的地面臭氧（O ₃ ）污染会改变陆地植物生态化学计量的磷（P）、碳（C）和氮（N），进而影响森林生产力、养分利用和碳汇能力。然而，在不同功能类型的快速周转器官（即细根和细叶）中，高O _{3水平对CNP化学计量}的影响仍然存在很多不确定性。本研究调查了 O ₃对不同植物器官库的 CNP 养分分配化学计量的影响，特别关注经常用于城市绿化的树种。O _3的影响随后通过回顾已发表的文献来评估不同功能树类型之间的 CNP 化学计量。在所有物种汇集的情况下，升高的O ₃降低，叶片C 和P 浓度增加，从而降低了叶片C:P 比率。升高的 O ₃增加了细根中的 N 浓度，从而降低了 C:N 比，尽管在叶片中没有观察到显着影响。升高的 O ₃显着降低了 C ( CS_叶) 和 N ( NS_{叶) 的叶片储量})，然而，在细根中没有观察到这些种群的变化。常绿阔叶树种细根和细叶中P、C、N的含量超过落叶树种。升高的O ₃显着降低落叶阔叶树种的CS_叶、NS_叶和PS_叶，而常绿树种则显着降低。文献分析进一步证明了与常绿树种相比，落叶树种的叶磷浓度增加较大的O _3诱导。O _3升高显着增加了落叶阔叶树种细根和叶片之间碳和氮储量的差异，而在常绿树种中观察到这种差异减小。本研究的结果有助于更好地理解城市绿化树种在 O ₃胁迫下的生态化学计量响应以及由此产生的养分利用策略。