森林与环境学报2025，Vol.45Issue(3)：246-253,8.DOI:10.13324/j.cnki.jfcf.202412021
闽北不同阔叶人工林叶片和土壤生态化学计量特征
Ecological stoichiometric characteristics of leaves and soil in different broad-leaved plantations in northern Fujian Province
摘要
Abstract
This study aims to examine the variations in nutrient utilization and balance of different broad-leaved species in subtropical hilly areas based on the functional and environmental correlation theories of plant ecological stoichiometry.Investigation was conducted in broad-leaved plantations of Mytilaria laosensis,Schima superba,Castanopsis fissa,and Choerospondias axillaris,which were main species planted along the ecological corridor around Mount Wuyi in northern Fujian.Comparisons were conducted regarding the carbon(C),nitrogen(N)and phosphorus(P)characteristics of soil and leaves and the C,N,and P homeostasis index and nutrient reabsorption efficiency among different species.The results were yielded as follows:(1)The leaf N/P ratios of various tree species ranged from 17.67 to 30.72.C.axillaris had higher N/P ratio than the other three tree species(P<0.05),while its leaf C/N ratio was lower(P<0.05).The foliar C/N ratio of S.superba was 32.00,higher than that of other tree species(P<0.05).The soil N/P ratio of S.superba was 4.42,exceeding that of other tree species(P<0.05).(2)The C,N,and P reabsorption efficiency of the deciduous tree species C.axillaris was higher than that of other evergreen tree species to varying degrees,while the relative nutrient reabsorption efficiency of M.laosensis was higher than that of other tree species(P<0.05).(3)The C,N,and P homeostasis index of M.laosensis was slightly higher than other tree species,with HC/N and HC/P values of 0.91 and 0.79,respectively,which indicated a hyposensitive state.The HN/P value of M.laosensis was 0.25,which suggested a sensitive state.The high leaf C/N and soil N/P ratios of S.superba suggested its strong ability to absorb and utilize nitrogen.M.laosensis has higher homeostasis indices HC/N and HC/P than other tree species,demonstrating good potential of adapting to complex and variable habitats.However,the relative nutrient reabsorption efficiency and homeostasis index of C.axillaris are low,making it susceptible to soil phosphorus deficiency and changes in environment.关键词
阔叶人工林/生态化学计量学/内稳态指数/养分重吸收效率Key words
broad-leaved plantation/ecological stoichiometry/homeostasis index/nutrient reabsorption efficiency分类
林学引用本文复制引用
漆龙,洪希群,林晗,陈灿,谢安强,张斌..闽北不同阔叶人工林叶片和土壤生态化学计量特征[J].森林与环境学报,2025,45(3):246-253,8.基金项目
福建省水土保持试验站对外科技项目"千年桐水土保持林对植被修复与涵养功能的效应机制"(KH220045A). （KH220045A）
