[1]林柳滨.苦竹林立竹形态塑性的林分密度效应[J].江苏林业科技,2018,45(03):11-14.[doi:10.3969/j.issn.1001-7380.2018.03.003]
　Lin Liubin.Responses of Pleioblastus amarus phenotypic plasticity to the changes of plantation density[J].Journal of Jiangsu Forestry Science &Technology,2018,45(03):11-14.[doi:10.3969/j.issn.1001-7380.2018.03.003]
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苦竹林立竹形态塑性的林分密度效应()
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《江苏林业科技》[ISSN:1001-7380/CN:32-1236/S]

卷:
第45卷
期数:
2018年03期
页码:
11-14
栏目:
试验研究
出版日期:
2018-06-30

文章信息/Info

Title:
Responses of Pleioblastus amarus phenotypic plasticity to the changes of plantation density
文章编号:
1001-7380（2018）03-0011-04
作者:
林柳滨
福建省沙县林业局，福建沙县 365500
Author(s):
Lin Liubin
Forestry Bureau of Shaxian County, Shaxian 365500, China
关键词:
苦竹;  林分密度;  形态塑性;  主成分分析; 秆形; 枝形; 冠形
Keywords:
Pleioblastus amarus;  Plantation density;  Phenotypic plasticity;  Principal Component Analysis;  Culm shape;  Branch shape;  Crown shape
分类号:
S758.5；S795.9
DOI:
10.3969/j.issn.1001-7380.2018.03.003
文献标志码:
A
摘要:
为揭示苦竹秆形、枝形和冠形特征对林分密度的响应规律，为苦竹良好形态建成的林分密度构建提供参考，调查测定了3种林分密度(低密度：14 430—16 545 株/hm2；中密度：31 590—34 560 株/hm2；高密度：54 120—55 560 株/hm2) 苦竹林2年生立竹秆形、枝形和冠形的主要因子。结果表明，随林分密度的增大，苦竹立竹胸径先升高后下降，立竹全高、枝下高和冠长总体呈升高趋势，而冠幅和枝盘数总体呈下降趋势，立竹胸径、枝下高和冠幅不同林分密度竹林间差异显著，且高密度竹林立竹全高、冠长均显著高于低密度竹林，枝盘数则相反。立竹分枝数、枝长和枝分角随林分密度的增大总体呈下降趋势，而枝夹角则相反，枝长和枝夹角不同林分密度竹林间差异显著，低、中密度竹林分枝数和枝分角显著高于高密度竹林。主成分分析表明中密度苦竹林立竹表型特征综合得分最高。研究表明，苦竹秆形、冠形和枝形存在明显的林分密度效应，林分密度增大苦竹高生长增加，冠形径向扩展受抑而趋于紧缩，枝形趋于稀疏，中密度苦竹林具有最大的立竹胸径、较长分枝与开张的角度，是试验区苦竹林立竹良好形态建成的适宜林分密度。
Abstract:
To approach the response of culm, branch and crown characteristics of Pleioblastus amarus to bamboo densities, and provide a theoretical guidance for suitable density of bamboo morphogenesis, the main indexes of culm, branch and crown of aged 2 bamboo from three P. amarus plantation densities (low density, 14 430—16 545 culms/hm2; medium density, 31 590—34 560 culms/hm2; high density, 54 120—55 560 culms/hm2) were determined. It was found that with the density increasing, the diameter at breast height(DBH) increased at first then decreased, and total height, height under branch and crown length increased overall while crown width and branch layers decreased. There was significant difference on DBH, height under branch and crown width among three densities. The total height, crown length of high density were higher than those of low density while the branch layers changed in an opposite trend. With the density increasing, branch number at each branch layer, branch length and angle between branches decreased overall while angle between branch and culm changed in an opposite trend. Branch length and angle between branches differed obviously among different density while the branch number at each branch layer, angle between branches of low or middle density was markedly higher than that of high density. Principal Component Analysis indicated that the comprehensive characteristic score of middle stand density was the biggest of the three densities. All results indicated P. amarus plantation density influenced culm, branch and crown morphological traits obviously. Height growth of bamboo was promoted, crown width was compressed and branch turned sparse under high density. Bamboo with the biggest DBH and comprehensive score, longer branch and angle at middle density showed the perfect morphological traits and plasticity. So middle bamboo density(31 590—34 560 culms /hm2) was preferred for the suitable morphogenesis for P. amarus.

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备注/Memo

备注/Memo:
收稿日期：2018-05-04;修回日期：2018-05-22
基金项目：“十三五”国家重点研发计划重点专项课题“笋用竹林精准培育及高效利用技术集成示范”（2016YFD0600903）
作者简介：林柳滨(1973- )，女，福建沙县人，工程师，大学本科毕业。主要从事森林培育与技术推广工作；E-mail:llb299@163.com。
更新日期/Last Update: 2018-08-01