| 生物土壤与生态 |
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| Environmental Effects on Distribution and Composition of Desert Vegetations in Alxa Plateau:Ⅱ.Correlation between C4 plants distribution and environmental factors |
| HE Ming-zhu, ZHANG Zhi-shan, LI Xiao-jun, JIA Rong-liang, ZHANG Jing-guang, ZHENG Jing-gang |
| Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract C4 plants of Alxa desert are principally manifested by Chenopodiaceae, Gramineae, and the life forms are most biennial and annual grasses, accounting for more than 70%; xerophytic and mesophytic C4 plants make up 48.89%, and whose floristic area-types are mainly from Cosmopolitan, Asia media and Tethys. Distribution of C4 plants presents different laws in Alxa region: distribution of C4 plants positively relates to temperature and negatively relates to precipitation along altitudinal zonality; it positively relates to precipitation and less relates to temperature along horizontal zone, especially, presence of C4 plants are limited in extremely high temperature and arid conditions (mainly in gobi desert area of Ejin Banner). The results can some explain the status of the water utilization efficiency of C4 plants in Alxa and its relationship with spatial precipitation distribution.
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Received: 12 November 2008
Published: 20 January 2010
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Cite this article:
HE Ming-zhu;ZHANG Zhi-shan;LI Xiao-jun;JIA Rong-liang;ZHANG Jing-guang;ZHENG Jing-gang. Environmental Effects on Distribution and Composition of Desert Vegetations in Alxa Plateau:Ⅱ.Correlation between C4 plants distribution and environmental factors. JOURNAL OF DESERT RESEARCH, 2010, 30(1): 57-62.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2010/V30/I1/57
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