大兴安岭北部主要乔木树种叶片-土壤碳氮磷生态化学计量特征  

The Foliar-soil Ecostoichiometric Characteristics of the Principal Arboreal Species in the Northern Region of the Greater Hinggan Mountains

作　　者：景继鑫 陈灿阳 满秀玲[1] 韩昭郅 JING Jixin;CHEN Canyang;MAN Xiuling;HAN Zhaozhi(College of Forestry,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《森林工程》2024年第3期1-10,共10页Forest Engineering

基　　金：国家重点研发计划项目(2021YFD2200405-4);黑龙江省级大学生创新训练项目资助(S202210225296)。

摘　　要：以大兴安岭北部多年冻土区典型森林群落主要乔木为研究对象,分析叶片和土壤碳(C)、氮(N)、磷(P)含量及生态化学计量特征,探讨叶片和土壤C、N、P生态化学计量之间的关系,为该地区森林生态系统养分循环研究提供理论依据。结果表明,4种乔木叶片C∶N范围为25.66~47.92,C∶P范围为323.83~603.86,N∶P为10.21~20.59,兴安落叶松叶片C∶P和N∶P均最低,樟子松叶片C∶N和C∶P均最高,白桦C∶N最低,山杨N∶P最高;4种乔木叶片C∶N和C∶P都高于全球植物平均水平,表明这些乔木叶片具有较高的N、P利用效率,同时山杨叶片N∶P>20,其生长主要受P素限制;不同的群落土壤C∶N为13.89~18.46,C∶P为35.43~77.19,N∶P为1.96~5.26,山杨林C∶P和N∶P均为最高,而C∶N最低。白桦林C∶N最高,N∶P最低。樟子松林C∶P最低。冗余分析结果显示,4种乔木叶片C、N、P生态化学计量与土壤之间存在显著相关关系,土壤C、N、P含量及化学计量对乔木固碳及氮磷吸收具有显著影响。由此可见,我国寒温带4种乔木具有较高的N、P利用效率,但山杨生长受到P的限制,叶片C、N、P生态化学计量与土壤生态化学计量显著相关。In this study,the main trees of typical forest communities in permafrost area of northern Greater Khingan Mountains were selected as the research objects,the contents of carbon(C),nitrogen(N)and phosphorus(P)in leaves and soil and their ecological stoichiometric characteristics were analyzed,and the relationship between leaves and soil C,N and P ecological stoichiometry was discussed to provide theoretical basis for the study of nutrient cycling in forest ecosystem in this area.Results indicated that the C∶N ratio of four tree leaves ranged from^(2)5.66 to 47.92,the C∶P ratio ranged from 323.83 to 603.86,and the N:P ratio ranged from 10.21 to 20.59.Larix gmelini exhibited the lowest C∶N and N∶P ratios,while Pinus sylvestris var mongolica had the highest C∶N and C∶P ratios,Betula platyphylla had the lowest C∶N ratio and Populus davidiana had the highest N∶P ratio.The C∶N and C∶P ratios of all four tree species exceeded the global average,suggesting efficient utilization of N and P.Nevertheless,the leaf N∶P>20 of Populus davidiana was primarily limited by P in its growth.The soil C∶N ratio of different communities ranged from 13.89 to 18.46,the C∶P ratio ranged from 35.43 to 77.19,and the N∶P ratio ranged from 1.96 to 5.26.Populus davidiana forests exhibited the highest C∶P and N∶P ratios,while having the lowest C∶N ratio.Betula platyphylla had the highest C∶N ratio and the lowest N∶P ratio.Pinus sylvestris var mongolica displayed the lowest C∶P ratio.The redundancy analysis results showed that there was a significant correlation between the ecological stoichiometry of C,N,and P in the leaves of four trees and the soil.The content and stoichiometry of soil C,N,P had a significant impact on the carbon fixation and nitrogen and phosphorus absorption of trees.It can be seen that the four types of trees in the cold temperate zone of China have high N and P utilization efficiency,but the growth of Populus davidiana is limited by P.The ecological stoichiometry of leaf C,N,and P is

关 键 词：大兴安岭北部地区 兴安落叶松 樟子松 生态化学计量 土壤 叶片 

分 类 号：S714[农业科学—林学]