翅荚木同龄林林木叶片性状与胸径生长关系  

Relationship between the Leaf Functional Traits and the Diameter Growth in Even-Aged Stands of Zenia insignis

作　　者：张雪 钟全林[1,2,3] 李宝银 姚湘明 徐朝斌[2,3] 程栋梁[1,2,3] 郑跃芳[1] 余华[1,5] Zhang Xue;Zhong Quanlin;Li Baoyin;Yao Xiangming;Xu Chaobin;Cheng Dongliang;Zheng Yuefang;Yu Hua(College of Geographical Sciences, Fujian Normal University, Fuzhou 350007;State Key Laboratory Breeding Base of Humid Subtropical Mountian Ecology ,Fuzhou 350007;Fujian Province Key Laboratory of Plant Ecophysiology, Fujian Normal University, Fuzhou 350007;Shunchang County Forestry Science and Technology Center of Fujian Province, Shunchang 353200;College of Oceanography, Minjiang University, Fuzhou 350108)

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]湿润亚热带山地生态国家重点实验室培育基地,福州350007 [3]福建师范大学福建省植物生理生态重点实验室,福州350007 [4]福建省顺昌县林业科学技术中心,顺昌353200 [5]闽江学院海洋学院,福州350108

出　　处：《林业科学》2020年第5期168-175,共8页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(31971643);中央财政林业科技推广项目(2015-12);福建省科技厅重大项目(2019N5009);福建省杰出青年基金项目(2018J07003)。

摘　　要：【目的】林木胸径是森林调查和经营评价的重要因子,通过对翅荚木人工同龄林各径阶林木叶结构型与功能型指标的测定与分析,探明其叶片性状与胸径生长关系,为翅荚木优良种质资源选择和养分精准管理提供理论依据。【方法】采用主成分分析法确定影响翅荚木人工同龄林胸径生长的叶片性状指标,并分析其对胸径生长的影响。【结果】不同径阶翅荚木单叶面积(ILA)、比叶面积(SLA)、叶相对含水率(LRWC)、叶碳含量(LCC)、叶氮含量(LNC)、叶磷含量(LPC)、C/N、C/P、N/P及单位叶面积氮、磷含量(Narea与Parea)存在显著差异;ILA与LRWC等叶结构型性状指标及Parea、C/P、LPC和N/P等叶功能型性状指标对其胸径生长具有重要影响。其中,ILA和Parea均与胸径生长量呈极显著线性正相关关系(P<0.01),LRWC和叶片N/P则均与胸径生长量呈极显著的线性负相关关系(P<0.01);叶片C/P与胸径生长量呈先下降后上升的二次抛物线关系(P<0.01),而LPC则与胸径生长量呈先上升后下降的二次抛物线关系(P<0.05);SLA、Narea、LCC、LNC与C/N等指标则与胸径生长量相关性不显著。【结论】叶结构型性状指标单叶面积、叶相对含水率及Parea、C/P、LPC和N/P等叶功能型性状指标对翅荚木胸径生长具有重要影响,其中叶结构型性状以ILA指标最为重要,叶功能型性状以反映叶片P含量(LPC和Parea)的性状指标最重要。【Objective】The tree diameter at breast height(DBH)is an important measurement factor in forest survey and forest management evaluation.In this study,the main leaf functional traits of different diameter classes in even-aged stands of Zenia insignis were determined in order to illuminate the relationship between the leaf functional traits and the diameter growth,which aims to provide theoretical basis for selection of excellent germplasm resources and precision nutrient management of Z.insignis.【Method】Principal component analysis(PCA)was used to determine the main leaf functional traits affecting the DBH growth of the even-aged stand of Z.insignis.【Result】Firstly,individual leaf area(ILA),specific leaf area(SLA),leaf relative water content(LRWC),leaf carbon content(LCC),leaf nitrogen content(LNC),leaf phosphorus content(LPC),leaf C∶N ratio(C/N),leaf C∶P ratio(C/P),leaf N∶P ratio(N/P),leaf nitrogen content based on area(Narea),and leaf area phosphorus content based on area(Parea)differed significantly among different diameter classes.Secondly,leaf structural traits,such as ILA and LRWC,and leaf functional traits,such as Parea,C/P,LPC and N/P,had important impact on the DBH growth.ILA and Parea showed a significant linear positive correlation with the diameter growth(P<0.01).LRWC and leaf N/P showed a significant linear negative correlation with the DBH growth(P<0.01).There was a quadratic parabola relationship between leaf C/P and DBH growth,showing increase after slightly decrease(P<0.01).Whereas there was a quadratic parabola relationship between LPC and the DBH growth,showing decrease after slightly increase(P<0.05).Thirdly,the correlations between SLA,Narea,LCC,LNC and C/N were not significantly correlated with the DBH growth.【Conclusion】Leaf structural and functional traits have important effects on the DBH growth of Z.insignis.ILA in structural traits as well as LPC and Parea in functional traits are the most important influencing factors.

关 键 词：叶结构型与功能型性状 胸径生长 主成分分析 相关关系 翅荚木 

分 类 号：S154.5[农业科学—土壤学]