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

作　　者：漆龙 洪希群 林晗[1,2] 陈灿 谢安强 张斌[4] QI Long;HONG Xiqun;LIN Han;CHEN Can;XIE Anqiang;ZHANG Bin(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Fujian Southern Forest Resources and Environmental Engineering Technology Research Center,Fuzhou,Fujian 350002,China;College of JunCao Science and Ecology,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Forestry Bureau of Jianyang District,Nanping,Fujian 354200,China)

机构地区：[1]福建农林大学林学院,福建福州350002 [2]福建省南方森林资源与环境工程技术研究中心,福建福州350002 [3]福建农林大学菌草与生态学院,福建福州350002 [4]南平市建阳区林业局,福建南平354200

出　　处：《森林与环境学报》2025年第3期246-253,共8页Journal of Forest and Environment

基　　金：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)。

摘　　要：为深入了解亚热带丘陵山地不同阔叶树种养分利用和平衡的差异,基于植物生态化学计量学的功能关联和环境关联理论,选择闽北环武夷山生态廊道建设的主要树种米老排、木荷、闽粤栲和南酸枣阔叶人工林,分析不同林分土壤和叶片碳、氮、磷(C、N、P)化学计量特征,不同树种C、N、P化学计量内稳态指数(H)及养分重吸收效率的差异。结果显示:(1)各树种叶片氮磷比(N/P)介于17.67~30.72之间,其中南酸枣叶片N/P最大,显著大于另外3种树种(P<0.05),但其叶片碳氮比(C/N)相对较小(P<0.05);而木荷叶片C/N为32.00,较其他树种显著偏高(P<0.05),其林下土壤N/P为4.42,同样显著大于其他树种(P<0.05)。(2)落叶树种南酸枣的C、N、P养分重吸收效率均不同程度大于其他常绿树种,但米老排的相对养分重吸收效率显著高于其他树种(P<0.05)。(3)米老排的C、N、P化学计量H总体略大于其他树种,HC/N、HC/P分别为0.91和0.79,属于弱敏态;HN/P为0.25,属于敏态。研究表明,木荷具有较高的叶片C/N和土壤N/P,表明其对N吸收和利用能力较强;米老排HC/N、HC/P均大于其他树种,显示较好的适应复杂多变生境的潜力;而南酸枣相对养分重吸收效率和内稳态指数较低,易受土壤P不足和环境变化的影响。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 c

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 

分 类 号：S714.2[农业科学—林学]