Plant community structure and environmental factors regulate N-P stoichiometry of soil and leaves of larch forests in northern China  

作　　者：Wenjing Fang Ming Ouyang Qiong Cai Suhui Ma Zhengbing Yan Haojie Su Jiangling Zhu Chengjun Ji Zhiyao Tang Jingyun Fang 

机构地区：[1]School of Ecology and Environmental Science,Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China,Yunnan University,Kunming,650091,People’s Republic of China [2]Institute of Ecology,College of Urban and Environmental Sciences,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing,100871,People’s Republic of China

出　　处：《Journal of Forestry Research》2025年第1期103-113,共11页林业研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.32201426,No.31988102);the Major Program for Basic Research Project of Yunnan Province(No.202101BC070002);the Key Research and Development Program of Yunnan Provin ce(No.202303AC100009).

摘　　要：Ecological stoichiometry plays an important role in revealing the mechanisms underlying biogeochemical cycles and ecosystem functions.Abiotic factors have strong effects on N-P stoichiometry,yet the impact of plant community structure,especially in forests,has not been fully elucidated.We investigated 68 plots in larch forests in northern China to explore how plant community structure and environmental factors affect the N-P stoichiometry of soil and leaves.The results showed significant differences in soil and leaf N-P stoichiometry among the three larch forests,P concentration and N:P ratio of leaves were significantly related to those of soil.Except for larch forest type,N-P stoichiometry was also regulated by elevation,climatic factors,and community structure.With increasing age(from 25 to 236 years),soil N and N:P ratio significantly increased,especially in the topsoil.With increasing mean DBH,leaf N concentration and N:P ratio also increased,indicating a shift in nutrient limitations with stand growth.These findings provide evidence that plant community structure and environmental factors regulate soil and leaf N-P stoichiometry,which is critically important for understanding biogeochemical cycles and forest management undergoing natural succession.

关 键 词：N-P stoichiometry Larch forest Community structure Stand age LEAF 

分 类 号：S791.22[农业科学—林木遗传育种] S714.2[农业科学—林学]