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| Soil Heterogeneity and Its Effects on Plant Community in Oasis Desert Transition Zone in the Lower Reaches of Tarim River |
| ZHENG Tian1, LI Jian-gui1, LI Wei-hong2,3, WAN Jiang-hui2,3 |
| 1.College of Forestry, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China;2.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China; 3.Key Laboratory of Oasis Ecology and Desert Environment, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China |
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Abstract 81 soil samples are collected from 9 soil profiles in Tieganlike oasis desert transition zone in the lower researches of Tarim River, based on which the spatial patterns of soil properties are analyzed by using non-parametric method and ANOVA. The relationship between plant species diversity and soil factors is also examined by using grey correlation analysis. Apart from the total P, the organic matter, total N, and total K distribute differentially in vertical profile, with significant differentiation at round 50 cm soil depth. In Tieganlike section along the Tarim River, the plant species diversity decreases from upper to lower reaches in correspondence to the same trend of soil nutrients. Consequently, the plant communities degrade from complexity to singleness, i.e. from the compound communities of arbor(predominated by Populus euphratica)+shrub(predominated by Tamarix spp)+herbage to pure Tamarix community. Grey correlation analysis indicates that there are significant relationships between plant species diversity and soil organic matter, total N, total P, and total K in the 0~50 cm soil layer.
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Received: 26 October 2008
Published: 20 January 2010
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2010, Vol. 30 
