文献类型：期刊文献

英文题名：Soil C:N:P Stoichiometry in Two Contrasting Urban Forests in the Guangzhou Metropolis: Differences and Related Dominates

作者：Xiong, Yongmei[1,2,3] Li, Zhiqi[1,3] Meng, Shiyuan[1,3] Xu, Jianmin[2]

第一作者：Xiong, Yongmei;熊燕梅

通信作者：Xiong, YM[1];Xiong, YM[2];Xu, JM[2];Xiong, YM[3]

机构：[1]Guangzhou Inst Forestry & Landscape Architecture, Guangzhou 510405, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China;[3]Guangzhou Collaborat Innovat Ctr Sci Tech Ecol & L, Guangzhou 510405, Peoples R China

年份：2025

卷号：16

期号：8

外文期刊名：FORESTS

收录：;EI(收录号：20253519085946);Scopus(收录号：2-s2.0-105014512884);WOS:【SCI-EXPANDED(收录号:WOS:001558673700001)】；

基金：This study was financially supported by the Social Development Project of Guangzhou Municipal Science and Technology Bureau (Grant No. 202206010058).

语种：英文

外文关键词：carbon sequestration; elemental stoichiometry; urban forests; soil properties; Guangzhou

摘要：Carbon (C) sequestration and nitrogen (N) and phosphorus (P) accumulation in urban forest green spaces are significant for global climate regulation and alleviating nutrient pollution. However, the effects of management and conservation practices across different urban forest vegetation types on soil C, N, and P contents and stoichiometric ratios remain largely unexplored. We selected forest soils from Guangzhou, a major Metropolis in China, as our study area. Soil samples were collected from two urban secondary forests that naturally regenerated after disturbance (108 samples) and six urban forest parks primarily composed of artificially planted woody plant communities (72 samples). We employed mixed linear models and variance partitioning to analyze and compare soil C, N, and P contents and their stoichiometry and its main driving factors beneath suburban forests and urban park vegetation. These results exhibited that soil pH and bulk density in urban parks were higher than those in suburban forests, whereas soil water content, maximum storage capacity, and capillary porosity were higher in urban forests than in urban parks. Soil C, N, and P contents and their stoichiometry (except for N:P ratio) were significantly higher in suburban forests than in urban parks. Multiple analyzes showed that soil pH had the most pronounced negative influence on soil C, N, C:N, C:P, and N:P, but the strongest positive influence on soil P in urban parks. Soil water content had the strongest positive effect on soil C, N, P, C:N, and C:P, while soil N:P was primarily influenced by the positive effect of soil non-capillary porosity in suburban forests. Overall, our study emphasizes that suburban forests outperform urban parks in terms of carbon and nutrient accumulation, and urban green space management should focus particularly on the impact of soil pH and moisture content on soil C, N, and P contents and their stoichiometry.