Species divergence in seedling leaf traits and tree growth response to nitrogen and phosphorus additions in an evergreen broadleaved forest of subtropical China

作     者：Xuemin Ye Wensheng Bu Xiaofei Hu Bin Liu Kuan Liang Fusheng Chen Xuemin Ye;Wensheng Bu;Xiaofei Hu;Bin Liu;Kuan Liang;Fusheng Chen

作者机构：Key Laboratory of National Forestry and Grassland Administration On Forest Ecosystem Protection and Restoration of Poyang Lake WatershedJiangxi Agricultural UniversityNanchang 330045People’s Republic of China Jiangxi Provincial Key Laboratory of SilvicultureCollege of ForestryJiangxi Agricultural UniversityNanchang 330045People’s Republic of China School of ManagementNanchang UniversityNanchang 330045People’s Republic of China 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2023年第34卷第1期

页      面：137-150页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：National Natural Science Foundation of China(grant numbers 31870427&31730014) by Jiangxi Province 2019 Graduate Innovation Fund Project(grant number YC2019-b061) 

主　　题：Ecophysiology Fertilization acclimation N fractions Nutrient limitation Photosynthesis Relative growth rate 

摘      要：Tree competitiveness generally depends on trait plasticity in response to environmental *** effects of nitrogen(N)and phosphorus(P)on leaf trait variability by species is poorly understood,especially in China’s subtropical *** study examined the seedling leaf traits and net primary productivity of all trees5 cm DBH of two dominant species,Schima superba and Castanopsis carlesii,in an evergreen broadleaved forest fertilized with nitrogen(+N),phosphorus(+P),and nitrogen plus phosphorus(N+P).The effect of N on seedling leaf traits was stronger than P,while fertilization in general was species *** mass per unit area decreased with N for *** seedlings but not for *** N,P,and N/P ratios changed with N addition for both *** four N fractions of carboxylation,bioenergetics,cell wall,and other N metabolites in *** leaves responded significantly to fertilization,while only the cell wall in *** a leaves *** leaf functional traits,including light-saturated photosynthetic rates,water,N,and P use efficiencies,chlorophyll and non structural carbohydrate contents increased with N addition in *** a and by P addition in *** closure at the stand-level increased due to *** biomass and relative growth rate of *** a was not affected by any treatments,while both for *** significantly decreased with N+P ***,nutrient limitation may vary at a small scale among species in a subtropical forest based on their responses of seedling traits and net primary productivity to *** traits are not correlated with the net primary productivity of larger trees except for N fractions,because low light conditions induced by fertilization reduces the proportion of N allocated to photosynthesis in *** addition,acclimation differences of tree species may increase the uncertainty of community succession.