热带亚热带森林乔木的径向生长速率与功能性状的相关性  

Relationships Between Diametral Growth Rate and Functional Traits of Tree Species in Tropical and Subtropical Forest

作　　者：张军 黄佳莉 万春燕 张峰 余俊瑞 王宏翔 朱师丹[1] ZHANG Jun;HUANG Jiali;WAN Chunyan;ZHANG Feng;YU Junrui;WANG Hongxiang;ZHU Shidan(Guangxi Key Laboratory of Forest Ecology and Conservation,Guangxi Colleges and Universities Key Laboratory for Cultivation and Utilization of Subtropical Forest Plantation,College of Forestry,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学林学院,广西森林生态与保育重点实验室,广西高校亚热带人工林培育与利用重点实验室,南宁530004

出　　处：《热带亚热带植物学报》2025年第2期121-130,共10页Journal of Tropical and Subtropical Botany

基　　金：国家自然科学基金项目(32171502)资助。

摘　　要：阐明树木功能性状与生长的相关性有助于预测气候变化背景下树种的生长动态。该研究在3个典型的热带亚热带森林样地共测定56种优势乔木树种的枝条抗栓塞能力(P50)、导水率(ks)、木材密度(WD)、比叶面积(SLA)和导管解剖特征等性状,同时,基于群落学调查数据分别计算大径级(DBH≥15 cm)、小径级(5~15 cm)和不区分径级(≥5 cm)的胸径生长速率(DGR),分析了性状与DGR间的相关关系。结果表明,不同径级乔木种的DGR与ks均显著正相关,但与SLA、P50和导管特征等性状均不相关。小径级树种的WD与DGR负相关,而大径级树种的WD与DGR不相关。该研究表明相较于经济学性状,木质部导水率能更好地预测热带亚热带森林乔木的生长速率。Exploring the correlation between tree functional traits and growth is helpful to predict the growth dynamics of tree species under climate change.A total of 56 dominant tree species were measured in 3 typical tropical and subtropical forest plots,including branch embolism resistance(P50),water conductivity(ks),wood density(WD),specific leaf area(SLA),and vessel anatomical traits.Diametral growth rate(DGR)of large diameter class(DBH≥15 cm),small diameter class(5-15 cm)and undifferentiated diameter class(≥5 cm)were calculated based on community survey data,and the correlation between traits and DGR was analyzed.The results showed that DGR of different diameter classes was positively correlated with ks,but not with SLA,P50 and vessel anatomical traits.WD and DGR with small diameter tree species were negatively correlated,but not with large diameter tree species.Therefore,it was suggested that xylem water conductivity could better predict the growth rate of tropical and subtropical forest trees than economic traits.

关 键 词：木质部解剖 水力效率 栓塞抗性 生长速率 木材密度 比叶面积 

分 类 号：R57[医药卫生—消化系统]