东北林业大学学报2026，Vol.54Issue(7)：55-63,9.
色季拉山不同径级急尖长苞冷杉树皮功能性状变异及权衡
Variation and Trade-off in Bark Functional Traits of Abies georgei var.smithii with Different Diameter Classes in Sejila Mountain
摘要
Abstract
To explore the variation characteristics and trade-off relationships of bark functional traits of Abies georgei var.smithii along diameter classes,this study took A.georgei var.smithii in Sejila Mountain as the research object.Samples were se-lected from three diameter at breast height(D)classes:D≤30 cm,30 cm＜D＜60 cm,and D≥60 cm.Eight functional traits including bark thickness,water content,density,and element mass fraction were determined.Statistical analysis was used to test the differences in bark functional traits among different diameter classes,and principal component analysis(PCA)combined with correlation analysis was applied to explore the synergistic relationships and trade-off patterns of bark functional traits.The results showed that:(1)Bark functional traits exhibited significant variation across different diame-ter classes.Total bark thickness increased with the rise in diameter class,rising from approximately 6 mm to 30 mm,while bark water content,total nitrogen mass fraction and total phosphorus mass fraction gradually decreased,declining from a-bout 53%,4.8 g/kg and 0.6 g/kg to 36%,3.3 g/kg and 0.4 g/kg,respectively.(2)Obvious synergistic and trade-off relationships existed among traits.Bark water content was extremely significantly negatively correlated with outer bark thickness and total bark thickness,and extremely significantly positively correlated with total nitrogen and total phosphorus mass fractions of bark.Outer bark thickness was extremely significantly positively correlated with total bark thickness,and extremely significantly negatively correlated with bark total nitrogen and total phosphorus mass fractions.Bark total nitrogen mass fraction had an extremely significantly positive correlation with total phosphorus mass fraction.(3)At different diam-eter class stages,key traits exerted distinct effects on tree growth.Thickness-related traits positively predicted tree height and diameter at breast height,whereas water content and total nitrogen mass fraction showed negative effects.(4)Princi-pal component analysis revealed that the first three principal components explained more than 69%of the total variation.With the increase of diameter class,the dominant effect of thickness traits was enhanced,while the synergy between water content and nutrient traits weakened,further indicating the differences in resource allocation and trade-off strategies of functional traits among different diameter classes.The variation pattern and trade-off structure of bark traits in A.georgei var.smithii reflect its functional adaptation strategies in response to environmental changes and resource availability across growth stages.关键词
急尖长苞冷杉/功能性状/变异权衡/树皮Key words
Abies georgei var.smithii/Functional traits/Variation and trade-off/Tree bark分类
农业科技引用本文复制引用
许文燕,李睿,王超,卢杰..色季拉山不同径级急尖长苞冷杉树皮功能性状变异及权衡[J].东北林业大学学报,2026,54(7):55-63,9.基金项目
西藏自治区科技计划项目(XZ202501JD0020、XZ202501ZR0103) （XZ202501JD0020、XZ202501ZR0103）
西藏高原森林生态教育部重点实验室研究生创新计划项目(XZAJYB-SYS-202407) （XZAJYB-SYS-202407）
西藏农牧大学创新人才队伍建设项目(XZNMXYRCXM-2024-05) （XZNMXYRCXM-2024-05）
西藏农牧大学青年科研基金项目(NYQNZR2025-06) （NYQNZR2025-06）
西藏农牧大学林学博士点(二期)项目(533325001). （二期）
