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林业科学 ›› 2012, Vol. 48 ›› Issue (5): 141-149.doi: 10.11707/j.1001-7488.20120522

• 研究简报 • 上一篇    下一篇

民勤沙拐枣克隆种群构件结构及与环境因子的灰色关联分析

周资行1, 焦健1, 李毅1, 李永兵2, 张世虎2   

  1. 1. 甘肃农业大学林学院 兰州 730070;2. 甘肃省民勤县林业局 民勤 733300
  • 收稿日期:2011-05-24 修回日期:2011-10-16 出版日期:2012-05-25 发布日期:2012-05-25
  • 通讯作者: 焦健

The Grey Relatedness Analysis between the Modular Structure of Clonal Population of Calligonum mongolicum and the Environmental Factors in the Minqin Desert

Zhou Zihang1, Jiao Jian1, Li Yi1, Li Yongbing2, Zhang Shihu2   

  1. 1. College of Forestry, Gansu Agricultural University Lanzhou 730070;2. Minqin Forestry Bureau of Gansu Province Minqin 733300
  • Received:2011-05-24 Revised:2011-10-16 Online:2012-05-25 Published:2012-05-25

关键词: 沙拐枣克隆种群, 构件结构, 环境因子, 灰色关联分析, 民勤沙地

Abstract:

Study on modules of clonal populations has important theoretical and practical significance to understand the survival regularity and environmental adaptation mechanisms. The grey system theory was used to analyze correlations between environmental factors and the modular structure of clonal populations of Calligonum mongolicum in the Minqin desert at genet, ramet and branch system levels. The results showed that: 1) Heights of genet and ramet could reflect the development status and environment adaptability and indicate the growth state of the modules of the clonal population. 2) The ramet had more significant effects on the whole modular structure than the genet. 3) The first grade branch system was the foundation for the whole clonal plant. The internal correlation analysis showed that diameter growth and length growth coordinated with each other. The second grade branch system had limited impact and could be taken as a transition system. The third grade branch system significantly influenced the present year branch system whose growth was dependent on both the first grade and third grade branches. 4) The correlation among the modules showed a strong hierarchy, indicating that the whole pattern of the modular structure was relatively reasonable, and the population had strong adaptability to environment. 5) There were close correlations between the 16 environmental factors in study and the modules. Climate factors played a crucial role, soil bulk density and the content of soil organic matter also strongly affected the growth and development of C. mongolicum, and the soil moisture content was also a relatively sensitive factor.

Key words: Calligonum mongolicum clonal population, modularity structure, environmental factors, grey relational analysis, Minqin desert sand

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