南亚热带山地常绿阔叶林树种木质部经济学谱分析  

Analysis of Xylem Economic Spectrum of Evergreen Broad-leaved Forest Tree Species in South Subtropical Mountain

作　　者：甘晶僖 张峰 黄冬柳 朱师丹[1] GAN Jingxi;ZHANG Feng;HUANG Dongliu;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131-139,共9页Journal of Tropical and Subtropical Botany

基　　金：国家自然科学基金项目(32171502)资助。

摘　　要：南亚热带中山地带的山地常绿阔叶林(简称山地林)具有重要的生态价值,但是对山地林树种的环境适应策略仍缺乏了解。该研究基于南亚热带山地林固定监测样地,对25种代表性常绿树种的木质部解剖结构、饱和含水量、机械强度以及水力结构等性状进行测定,分析木质部经济学谱系,阐明山地林树种的生理生态策略。结果表明,边材比导率与导管密度和导管腔比例显著相关,但是其他木质部结构特征与生理功能之间无直接的对应关系,缺乏共同的结构基础导致木质部水力学性状、饱和含水量和机械强度之间无显著的相关性。因此,山地林树种不支持木质部经济学谱系关系。边材比导率和栓塞抗性之间无权衡关系,可能与山地林较低的环境选择压力有关。群落重要值较高的树种具有较低的木材密度以及较高的边材比导率和饱和含水量,说明提高木质部水分运输能力和储水能力有利于适应山地环境。该研究揭示了山地林常绿树种木质部性状组合的多样性,有利于树种共存和应对环境变化。The montane evergreen broad-leaved forest in the south subtropical zone has important ecological value,but the environment adaptation strategies of montane forest species are still not well understood.Based on the fixed monitoring plots of south subtropical mountain forest,xylem anatomical structure,saturated water content,mechanical strength and hydraulic structure of 25 representative evergreen tree species were determined,xylem economic spectrum was analyzed,and physiological and ecological strategies of tree species in mountain forest were clarified.The results showed that the specific conductivity of sapwood was significantly correlated with the vessel density and the proportion of vessel cavities,but there was no direct correspondence between other xylem structural characteristics and physiological functions.The lack of common structural basis led to no significant correlation between xylem hydraulic properties,saturated water content and mechanical strength.Therefore,the tree species in the mountain forest do not support the xylem economic pedigree.There was no tradeoff between sapwood specific conductivity and embolic resistance,which may be related to the lower environmental selection pressure in mountain forest.The tree species with higher community importance value had lower wood density and higher sapwood specific conductivity and saturated water content,indicating that improving xylem water transport capacity and water storage capacity was conducive to adapting to the mountain environment.This study revealed the diversity of xylem character combinations of evergreen tree species in mountain forest,which is conducive to tree species coexistence and coping with environmental changes.

关 键 词：解剖结构 机械强度 水力学 木材密度 饱和含水量 

分 类 号：S66[农业科学—果树学]