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  • ISSN 1000-694X
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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

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.

Cite this article

Wang Linlong , Liu Minghu , Li Qinghe , Xu Jun . Architecture Characteristics of Helianthemum songaricum under Different Habitats[J]. Journal of Desert Research, 2016 , 36(3) : 651 -658 . DOI: 10.7522/j.issn.1000-694X.2015.00013

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