| 胡杨根系分布特征与根系吸水模型建立 |
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| 引用本文： | 冯起,司建华,李建林,席海洋.胡杨根系分布特征与根系吸水模型建立[J].地球科学进展,2008,23(7):765-772. |
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| 作者姓名： | 冯起 司建华 李建林 席海洋 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所黑河生态水文与流域集成管理研究实验室,阿拉善荒漠生态-水文试验研究站,甘肃,兰州,730000 |
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| 基金项目： | 国家自然科学基金杰出青年基金项目"荒漠绿洲水文-生态过程耦合试验模拟研究"
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国家自然科学基金项目"荒漠绿洲水文-生态过程耦合试验研究"
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"极端干旱区胡杨单株与林分耗水是测定与尺度转换研究"
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国家自然科学基金重点项目"黑河流域生态-水文过程研究集成" |
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| 摘 要： | 依据2006年和2007年6~7月在极端干旱区额济纳的实测资料，利用分形和概率统计的方法对胡杨根系分布与根区土壤水分的关系进行了分析研究。引入土壤含水率期望(cm·g/g)的概念，建立了含水率期望值与根系分维值之间的函数关系，并求出了适宜胡杨生长的土壤含水率期望值的范围。同时建立了初版的根系吸水模型，并进行验证，得到较好的结果。
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| 关 键 词： | 极端干旱区 胡杨 根系分布 土壤含水率期望 根系吸水模型 |
| 收稿时间： | 2008-04-27 |
| 修稿时间： | 2008-06-12 |
Feature of Root Distribution of Populus Euphratica and Its Water Uptake Model in Extreme Arid Region |
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| FENG Qi,SI Jianhua,LI Jianlin,XI Haiyang.Feature of Root Distribution of Populus Euphratica and Its Water Uptake Model in Extreme Arid Region[J].Advance in Earth Sciences,2008,23(7):765-772. |
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| Authors: | FENG Qi SI Jianhua LI Jianlin XI Haiyang |
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| Institution: | Heihe Laboratory of Ecohydrology and Integrated Basin Management, Alex Desert Ecohydrological Experimental Research Station, Cold and Arid Regions Environmental Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Based on the data observed at Ejin Banner from June to July in 2006 and 2007, using fractal theory and statistical method, the relationship between root distribution of Populus euphratica oliv and soil moisture content of root system was analyzed. A new definition, expectation of soil moisture content (E/ cm·g·g-1), was introduced in order to reflect better characteristic of soil moisture in root zone. The function between expectation of soil moisture content and root fractal dimensions was obtained. Also built the preliminary root water uptake model, and a good result by comparing the simulation value with observation value was achieved. |
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| Keywords: | Extreme arid region Populus euphratica oliv Roots distribution Expectation of soil moisture content Root water uptake model |
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