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  • CN 62-1070/P
  • ISSN 1000-694X
  • 双月刊 创刊于1981年
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生物与土壤

不同生境半日花(Helianthemum songaricum)植物构型特征

  • 王林龙 ,
  • 刘明虎 ,
  • 李清河 ,
  • 徐军
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  • 1. 中国林业科学研究院林业研究所 国家林业局林木培育重点实验室, 北京 100091;
    2. 中国林业科学研究院沙漠林业实验中心, 内蒙古 磴口 015200
王林龙(1988-),男,湖南人,硕士研究生,主要从事植物逆境生理生态方面的研究。E-mail:524343921@qq.com

收稿日期: 2014-11-20

  修回日期: 2015-01-22

  网络出版日期: 2016-05-20

基金资助

国家科技计划项目专题(2012BAD16B0102);国家自然科学基金项目(31470622)

Architecture Characteristics of Helianthemum songaricum under Different Habitats

  • Wang Linlong ,
  • Liu Minghu ,
  • Li Qinghe ,
  • Xu Jun
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  • 1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;
    2. Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, Inner Mongolia, China

Received date: 2014-11-20

  Revised date: 2015-01-22

  Online published: 2016-05-20

摘要

荒漠植物构型是植物与环境相互作用、相互适应的结果,其与功能的相互作用决定了荒漠植被的发展与演替。系统研究了半日花(Helianthemum songaricum)的分枝率、分枝角度、分枝长度和枝茎比等构型特征,对比研究了不同土壤类型和不同坡位间、半日花的构型特征响应及其适应机理。结果表明:覆沙地半日花的总体分枝率为0.49±0.03,石砾地半日花总体分枝率0.56±0.03;逐步分枝率SBR2:3SBR3:4呈现覆沙地半日花大于石砾地半日花,SBR1:2则表现相反;半日花1~4级分枝角度集中在30°~42°,并且1级到4级呈增大趋势;覆沙地的枝茎比RBD2:1RBD3:2RBD4:3分别为0.57±0.05、0.59±0.05、0.51±0.05,石砾地分别为0.68±0.06、0.72±0.06、0.50±0.03,其中枝茎比RBD2:1RBD3:2RBD4:3都呈现先增大后减小趋势;覆沙地半日花的1~3级枝长均大于石砾地半日花,4级枝长小于石砾地半日花,且覆沙地和石砾地半日花的1~4级分枝长度呈依次减小的趋势;同一土壤条件下,不同坡位半日花的枝系构型特征不存在显著性差异。覆沙地半日花枝系长度、粗度、以及枝条数均大于石砾地半日花,能够获得更多空间资源,在植物竞争和演替过程中,其构型特征具有一定的优势。

本文引用格式

王林龙 , 刘明虎 , 李清河 , 徐军 . 不同生境半日花(Helianthemum songaricum)植物构型特征[J]. 中国沙漠, 2016 , 36(3) : 651 -658 . DOI: 10.7522/j.issn.1000-694X.2015.00013

Abstract

Architecture characteristics of desert plants are final product of plant-environment interaction and mutual adaption, and the interaction and feedback among them would determine the development and succession of desert plant. In order to understand architecture characteristics and adaptation mechanism of Helianthemum songaricum in different soil types and different slope positions, the architecture characteristics including the bifurcation ratio, the branch angle, the branch length, and the ratio of branch diameter of H.songaricum were studied. The results showed that, the over bifurcation ratio of H.songaricum in sandy soil was 0.49±0.03, lower than that of 0.56±0.03 in rocky soil; The stepwise bifurcation ratios of SBR2:3 and SBR3:4 of H.songaricum in sandy soil were less than those in rocky soil, while that of SBR1:2 greater for H.songaricum in sandy soil relative to rocky soil; The branch angles of H.songaricum mainly ranged from 30° and 42°, and tended to increase from the first class to the fourth class. The ratio of branch diameter RBD2:1, RBD3:2 and RBD4:3 of H.songaricum, increased first and then decreased with the value of 0.57±0.05, 0.59±0.05 and 0.51±0.05 under sandy soil respectively,and 0.68±0.06, 0.72±0.06, 0.50±0.03 under rocky soil. The branch length of H.songaricum ranged from the first class to the third class in sandy soil was greater than that in rocky soil, while the fourth class branch length was less in sandy soil than in rocky soil. And from the first class to the fourth class, the branch length decreased gradually in both soil types. In conclusion, the numbers, length and stem size of H. songaricum branch were greater in sandy soil than in rocky soil, so H. songaricum individual in sandy soil can obtain more resource due to advantage of architecture characteristics in the process of vegetation competition and succession.

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