不同林分密度下叶片功能性状比较  

Comparison of Leaf Functional Traits Under Different Stand Densities

作　　者：赵昌高 余丽慧 华剑文 陈翊 季必浩 季赛娟 ZHAO Changgao;YU Lihui;HUA Jianwen;CHEN Yi;JI B ihao;JI Saijuan(Center of Ecological Forestry Development,Jingning S he Nati onality Autonomous County,Jingning 323500,Zhejiang,China)

机构地区：[1]景宁畲族自治县生态林业发展中心,浙江景宁323500

出　　处：《福建林业科技》2023年第4期48-54,71,共8页Journal of Fujian Forestry Science and Technology

基　　金：浙江省景宁县科技计划项目(2022A36);2022省级林业专项资金(浙财资环[2021]68号)。

摘　　要：2020年,以浙江省景宁草鱼塘林场营造的珍贵树种混交林分中10~12年生的红豆树和小叶青冈为研究对象,分析测定不同林分密度(800、1600、2500、3300株·hm^(-2))下叶片的形态变化、比叶重和生理变化等。结果表明:红豆树叶片性状在低于2500株·hm^(-2)的密度条件下,变化不显著;而在密度3300株·hm^(-2)条件下,叶片的面积、重量、厚度均变小,显著阻碍生长;小叶青冈叶片性状与伴生树种季节性变换相适应,整体受林分密度影响不显著。不同密度条件下红豆树与小叶青冈幼树叶片生理生化指标表现存在差异,适宜在1600~2500株·hm^(-2)林分密度条件下生长。In 2020,10 to 12-year-old Ormosia hosiei and Cyclobalanopsis myrsinif oliatr ees in a mixed stand of rare tree species at the grass carp pond forest farm in Jingning,Zhejiang Province were studied,the morphological changes,specific l eaf weight and physiological changes of leaves under different stand densities(800,1600,2500 and 3300 plant·hm^(-2))were analyzed.The results showed th at under the density of less than 2500 plants·hm^(-2),the leaf characters of Ormosia hosiei had no significant change,but under the density of 3300 plant·hm^(-2),th e leaf area,weight and thickness all decreased,the leaf traits of the C.myrsinifolia were adapted to the seasonal changes of the associa ted tree species,but were not significantly affected by stand density.There was no sig nificant diffe rence in physiological and biochemical indexes between saplings of Ormos ia hosiei and C.myrsinifolia under different densities,and it was suitable to grow under the stand density of 1600~2500 plant·hm^(-2).

关 键 词：红豆树 小叶青冈 林分密度 叶片功能性状 

分 类 号：S718.43[农业科学—林学]