Effects of Vegetation Restoration Age on Soil C:N:P Stoichiometry in Yellow River Delta Coastal Wetland of China  

作　　者：CAO Qixue WANG Xiaojie CHU Xiaojing ZHAO Mingliang WANG Lianjing SONG Weimin LI Peiguang ZHANG Xiaoshuai XU Shendong HAN Guangxuan 

机构地区：[1]School of Geography and Environment,Liaocheng University,Liaocheng 252000,China [2]Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation,Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai 264003,China [3]Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosystem,Chinese Academy of Sciences,Dongying 257500,China

出　　处：《Chinese Geographical Science》2024年第6期1045-1059,共15页中国地理科学（英文版）

基　　金：Under the auspices of Natural Science Foundation of China(No.U2106209,42071126);Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA23050202);International Science Partnership Program of the Chinese Academy of Sciences(No.121311KYSB20190029)。

摘　　要：Vegetation restoration can alter carbon(C),nitrogen(N),and phosphorus(P)cycles in coastal wetlands affecting C:N:P stoichiometry.However,the effects of restoration age on soil C:N:P stoichiometry are unclear.In this study,we examined the re-sponses of soil C,N,and P contents and their stoichiometric ratios to vegetation restoration age,focusing on below-ground processes and their relationships to aboveground vegetation community characteristics.We conducted an analysis of temporal gradients based on the'space for time'method to synthesize the effects of restoration age on soil C:N:P stoichiometry in the Yellow River Delta wetland of China.The findings suggest that the combined effects of restoration age and soil depth create complex patterns of shifting soil C:N:P stoichiometry.Specifically,restoration age significantly increased all topsoil C:N:P stoichiometries,except for soil total phosphorus(TP)and the C:N ratio,and slightly affected subsoil C:N:P stoichiometry.The effects of restoration age on the soil C:N ratio was well constrained owing to the coupled relationship between soil organic carbon(SOC)and total nitrogen(TN)contents,while soil TP con-tent was closely related to changes in plant species diversity.Importantly,we found that the topsoil C:N:P stoichiometry was signific-antly affected by plant species diversity,whereas the subsoil C:N:P stoichiometry was more easily regulated by pH and electric con-ductivity(EC).Overall,this study shows that vegetation restoration age elevated SOC and N contents and alleviated N limitation,which is useful for further assessing soil C:N:P stoichiometry in coastal restoration wetlands.

关 键 词：coastal wetland restoration age soil C:N:P stoichiometry soil properties plant species diversity Yellow River Delta of China 

分 类 号：S153.6[农业科学—土壤学] X171.1[农业科学—农业基础科学] X144[环境科学与工程—环境科学]