生态学杂志2025，Vol.44Issue(11)：3662-3672,11.DOI:10.13292/j.1000-4890.202511.023
城市化对不同林型土壤酶化学计量特征的影响
Effects of urbanization on soil enzyme stoichiometric characteristics of different stand types
摘要
Abstract
Soil enzyme activity and its stoichiometric characteristics are important indicators for characterizing the balance of microbial metabolism and soil nutrient supply.However,the stoichiometric characteristics of soil enzymes and the differences in microbial nutrient limitations among different forest stand types under the background of rapid urbanization remain unclear.We analyzed soil enzyme stoichiometry and its influencing factors across coniferous for-est(pure Pinus massoniana forest),broad-leaved forest(camphor forest or oak forest),mixed coniferous and broad-leaved forest in both urban areas(Turtle Mountain,Yujia Mountain and Lion Mountain),and suburban are-as(Jiufeng Mountain,Qinglong Mountain,and Jiuzhen Mountain)of Wuhan.We further explored the nutrient lim-itation of soil microorganisms.The activities of β-1,4-glucosidase(BG),β-1,4-N-acetylglucosidase(NAG),leu-cine aminopeptidyase(LAP),and acid phosphatase(ACP)were higher in the urban areas than those in the sub-urban areas,while the activities of BG and ACP in broad-leaved forests were significantly higher than those in co-niferous forests and mixed coniferous and broad-leaved forests.The soil enzyme vector angles(VA)of all stands were＞45°,indicating that microorganisms were generally phosphorus-limited,with the degree of limitation being higher in the suburb aeras.Redundancy analysis showed that soil available nutrients(available N and P),C∶N,and MBN were the main factors affecting soil enzyme activities and stoichiometric ratios.In conclusion,urbanization may regulate microbial metabolism and enzymatic stoichiometric changes by altering the availability of forest soil nu-trients and microbial biomass,thereby influencing soil nutrient cycle.It is suggested that in future urban forest man-agement,native broad-leaved tree species should be appropriately increased to optimize stand structure,and that fertilizers should be applied reasonably to alleviate soil P limitation in suburban forests,thereby promoting sustain-able management of urban forests.关键词
土壤酶活性/酶化学计量/城市化/林分类型/养分限制Key words
soil enzyme activity/enzyme stoichiometry/urbanization/stand type/nutrient limitation引用本文复制引用
张帅,陈乃玉,贾秀红,槐豪奇..城市化对不同林型土壤酶化学计量特征的影响[J].生态学杂志,2025,44(11):3662-3672,11.基金项目
国家重点研发项目(2022YFF1303002)资助. （2022YFF1303002）
