Influence of Environmental Factors on Formation of Morphological Structure of Caragana Korshiskii. in Semi-arid Region

ZHAO Yan-yun; CHENG Ji-min; WANG Yan-ping; WAN Hui-e; HU Xiang-ming

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Influence of Environmental Factors on Formation of Morphological Structure of Caragana Korshiskii. in Semi-arid Region

- Influence of Environmental Factors on Formation of Morphological Structure of Caragana Korshiskii. in Semi-arid Region
- Bulletin of Soiland Water Conservation Vol. 24, Issue 3, Pages: 9-14(2005)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所，陕西杨凌,712100
  2. 中国科学院研究生院,北京,100049
  3. 山东农业大学,山东,泰安,271000
- 作者简介：
- 基金信息：
- DOI：
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- Published：2005
- 稿件说明：
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ZHAO Yan-yun, CHENG Ji-min, WANG Yan-ping, et al. Influence of Environmental Factors on Formation of Morphological Structure of Caragana Korshiskii. in Semi-arid Region[J]. Bulletin of Soiland Water Conservation, 2005, 24(3): 9-14.
DOI：

ZHAO Yan-yun, CHENG Ji-min, WANG Yan-ping, et al. Influence of Environmental Factors on Formation of Morphological Structure of Caragana Korshiskii. in Semi-arid Region[J]. Bulletin of Soiland Water Conservation, 2005, 24(3): 9-14. DOI：

摘要

以半干旱区宁夏固原17a生柠条灌木林为研究对象

分析了不同地形、整地方式及降雨量对柠条生长形态的影响

并对影响柠条单株形态组成的指标进行了主成分分析。研究结果表明:(1)不同坡位对柠条的株高、根深、生物量影响显著

而对柠条的分枝数没有明显影响;不同整地方式对柠条的株高、分枝、根深及单株生物量均影响显著。(2)降雨量对柠条形态组成影响深刻

柠条的株高、分枝、单株生物量与年度累积降雨量之间呈"S"型曲线

说明柠条形态建成与降雨量有极大的相关性;根系的生长与降雨量之间则呈指数规律增长。(3)柠条各生长指标间存在着紧密的联系。株高、分枝、株生物量是描述柠条地上部形态结构特征的指标组合;根深则是描述柠条地下形态结构的指标。

Abstract

Abstrcat Using the Caragana korshiskii. shrubbery of 17 years in Shanghuang as the studied object

this article analyzed the effect of different topography

site preparation modes and annual accumulated rainfall to the formation of morphological structure of the Caragana korshiskii. shrubbery. The height

the root depth

the number of branches and the biomass of Caragana korshiskii. shrubbery in different topography and preparation modes were studied. By using the principal component analysis

the results suggested: (1) The effect of different topography was significant to the tree height

root depth and biomass

but the number of branches was not. The effect of different site preparation was also significant to all biologic indices. (2) The effect of annual accumulated rainfall on the formation of morphological structure of Caragana korshiskii. shrubbery was high. By analyzing the regression about tree height

root depth

number of branches and biomass of Caragana korshiskii. with total precipitation

the curve of tree height

the number of branches and biomass were showed as "S" pattern

which suggested the correlation between the annual accumulated rainfall and the indices were very large.The relationship between root depth and the annual accumulated rainfall was the shape of exponential curve. (3) All growth indices have close relation. Tree height

branches and biomass were aboveground combined indices to the descriptive of plant and the root depth was the under-ground one

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