不同造林密度对泡桐幼林生长和林分蓄积量的影响  

Effects of Different Planting Densities on Saplings Growth and Stand Volume of Paulownia

作　　者：毛碧辉 吕成群[1] 黄宝灵[1] 李昆龙 陈振飞 董必珍 任涵[1] MAO Bi-hui;Lü Cheng-qun;HUANG Bao-ling(Forestry School,Guangxi University,Nanning,Guangxi 530001)

机构地区：[1]广西大学林学院,广西南宁530001 [2]广西绿桐林业科技有限公司,广西南宁530002

出　　处：《安徽农业科学》2018年第20期102-105,共4页Journal of Anhui Agricultural Sciences

基　　金：广西林业科技项目(桂林科研2015第25号)

摘　　要：[目的]研究造林密度对泡桐幼林生长和林分蓄积量的影响。[方法]在广西自治区南宁市江南区苏圩镇,采用随机区组试验设计研究不同造林密度(625、833、1 111、1 666株/hm^2)对2年生泡桐生长、材积、蓄积量的影响,经过定位观测,探讨种群密度与胸径、树高、立木单株材积、冠幅、蓄积量、枝下高等的作用规律和相关模型。[结果]造林密度对胸径、冠幅及材积和蓄积量的影响达极显著水平;造林密度对树高、枝下高的影响达显著水平。[结论]泡桐幼林的合理造林密度在1 111~1 666株/hm^2。[Objective] To study effects of different planting densities on saplings growth and stand volume of Paulownia.[Method]Effects of different planting densities（ 625,833,1 111,1 666 trees/hm2） on the growth,volume,and accumulation of 2-year-old Paulownia were studied with randomized block in Suwei District,Nanning,Guangxi Autonomous Region.The functional rule and correlation model between the population density of Paulownia and DHB,height,individual standing volume,crow cover,volume of forest-crop,live braches height were observed and analyzed.[Result]Effects of density on the DBH,the crow cover,the individual standing volume,the volume of forest-crop were extremely significant,and effects of density on tree height and height under the branches were significant.[Conclusion]The reasonable density of Paulownia was suggested to be between 1 111 and 1 666 trees/hm2.

关 键 词：泡桐 造林密度 蓄积量 生长 

分 类 号：S727[农业科学—林木遗传育种]