文献类型：期刊文献

英文题名：Successive planting changes the C:N:P stoichiometry of the leaf-litter-soil-microbial biomass system in Chinese fir (Cunninghamia lanceolata) plantations in China: A meta-analysis

作者：Xu, Yongchao[1] Cheng, Jie[1] Zhang, Runzhe[1] Hou, Lingyu[1] Dong, Yuhong[1] Liu, Lei[1] Sun, Qiwu[1]

第一作者：Xu, Yongchao

通信作者：Liu, L[1];Sun, QW[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Efficient Prod Forest Resources, Key Lab Tree Breeding & Cultivat State Forestry &, Beijing 100091, Peoples R China

年份：2026

卷号：599

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001607770800007)】；

基金：Acknowledgments This study was financially supported by the National Key R&D Program 2023YFF1304404 and the Fundamental Research Funds for the Central Non-profit Research Institution of Chinese Academy of Forestry (CAFYBB2023QC001) . All authors thank to Professor Weidong Zhang from Shenyang Institute of Applied Ecology,Chinese Academy of Sciences for guiding this experiment.In particular,it provides great guidance and help in the aspects of topic selection and experimental methods in the early stage.

语种：英文

外文关键词：Chinese fir; Successive planting; Meta-analysis; Ecological stoichiometry; Nutrient cycling

摘要：Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) is an important economic tree species in southern China, but successive planting disrupts nutrient cycling and stoichiometric balance, challenging sustainable management. Ecological stoichiometry, by analyzing the balance of carbon(C), nitrogen(N), and phosphorus(P), offers new insights into element balance and nutrient cycling mechanisms.However, the effects of successive planting on the C:N:P stoichiometry of leaves,litter,soil, and microorganisms exhibit complex patterns varying across environments.To address this,we integrated 910 observations from 116 studies using meta-analysis, and random forest algorithms to investigate the impacts on different components of Chinese fir plantations.The results showed that successive planting significantly increased the soil C:N ratio by 20.21 %, particularly in third-generation plan-tations(+45.41 %), and decreased the microbial biomass C:N ratio by 16.89 %. Litter C:P increased significantly with planting generations, while leaf ratios showed no significant overall changes.Subgroup analysis revealed a greater C:N increase in subsoil(>20 cm) than in topsoil(0-20 cm),with a 72.48 % rise in third-generation plantations.Soil pH and stand age were primary driving factors for changes in stoichiometric characteristics, with pH mainly affecting topsoil and stand age predominantly affecting subsoil. We recommend soil amendments, adjustment of the rotation period by delaying harvesting until beyond 20 years, and introduction of understory plant functional groups (PFGs) to facilitate sustainable development of Chinese fir plantations.This study reveals the complex impacts of successive planting on C:N:P stoichiometry, indicating soil degradation risks and providing a basis for optimizing management practices.