林业科学2026，Vol.62Issue(8)：43-54,12.DOI:10.11707/j.1001-7488.LYKX20260049
蒙古栎多器官功能性状的协同与权衡关系及其对土壤碳氮含量的响应
Synergistic and Trade-off Relationships among Multi-Organ Functional Traits of Quercus mongolica and Their Responses to Soil Carbon and Nitrogen Contents
摘要
Abstract
[Objective]Based on the vertical distribution of soil organic carbon and total nitrogen in different soil layers,this study aims to examine the coordination and trade-offs among leaf,branch,and root functional traits of Quercus mongolica,and to clarify its resource-use strategy,thereby providing a theoretical basis for its scientific management.[Method]The functional traits of leaves,branches,and roots of typical Q.mongolica in the Liaodong mountainous area,including total carbon content,total nitrogen content,leaf dry matter content,specific leaf area,specific root length,root average diameter,and root tissue density,were measured.Combined with soil organic carbon and total nitrogen contents measured at depths of 0-10,10-20,and 20-30 cm,the relationships among functional traits of different organs of Q.mongolica and their associations with soil carbon and nitrogen stoichiometric characteristics were analyzed.[Result]1)There were significant differences in carbon and nitrogen contents,as well as their stoichiometric ratios among organs of Q.mongolica(P<0.01).Among them,carbon content followed a pattern of root>leaf>branch,nitrogen content followed a pattern of leaf>root>branch,and the carbon to nitrogen ratio followed a pattern of branch>root>leaf.The spectrum of continuous resource utilization strategies overall formed from"fast investment-return"in leaves to"slow investment-return"in branches and"persistent maintenance"in roots,corresponding to the resource-use strategy of"acquisitive-conservative-persistent".2)There were significant correlations among functional traits of different organs of Q.mongolica.Among them,branch carbon to nitrogen ratio was negatively correlated with specific leaf area(P<0.01)and positively correlated with leaf dry matter content(P<0.01),root nitrogen content was positively correlated with leaf nitrogen content(P<0.01),and specific leaf area was positively correlated with specific root length(P<0.01),indicating that functional traits of different organs of Q.mongolica did not vary independently,but rather coordinated resource allocation and use through internal linkages.In addition,average diameter of roots was negatively correlated with root tissue density(P<0.01),indicating a trade-off between structural construction and resource acquisition in roots of Q.mongolica,showing a"structure-function decoupling"pattern and reflecting the complexity of belowground resource acquisition.3)Soil organic carbon and total nitrogen contents decreased with increasing soil depth,showing a clear surface enrichment pattern,while soil carbon to nitrogen ratio did not differ significantly among layers.The first principal component,representing the soil carbon and nitrogen content gradient,had a significant effect on the variation of functional traits of different organs of Q.mongolica(P<0.05),while the second principal component,representing soil carbon to nitrogen ratio,showed no significant effect.Additionally,functional traits of different organs of Q.mongolica showed consistent or opposite trends along the soil carbon and nitrogen content gradient,indicating that Q.mongolica responded to soil carbon and nitrogen content gradient through coordination and trade-offs among multiple organ functional traits.[Conclusion]Functional traits of different organs of Q.mongolica do not significantly respond to soil carbon to nitrogen ratio,but respond to variations in soil carbon and nitrogen contents through coordination and trade-offs among organ functional traits,showing an"acquisitive-conservative-persistent"resource-use strategy.关键词
蒙古栎/功能性状/土壤碳氮/生态化学计量/适应策略Key words
Quercus mongolica/functional traits/soil carbon and nitrogen/ecological stoichiometry/adaptive strategy分类
农业科技引用本文复制引用
任雪莹,许智荣,王璇,李重仪,赵秀海,何怀江,张春雨,张新娜..蒙古栎多器官功能性状的协同与权衡关系及其对土壤碳氮含量的响应[J].林业科学,2026,62(8):43-54,12.基金项目
国家重点研发计划项目(2023YFF1304004-06) （2023YFF1304004-06）
北京林业大学"5-5工程"科研创新团队项目(BLRC2023B06). （BLRC2023B06）
