| 额济纳绿洲柽柳群落蒸散特征的初步分析 |
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| 引用本文： | 周茅先,肖洪浪,张小由,龚家栋.额济纳绿洲柽柳群落蒸散特征的初步分析[J].中国沙漠,2004,24(4):479-483. |
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| 作者姓名： | 周茅先 肖洪浪 张小由 龚家栋 |
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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,甘肃,兰州,730000 |
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| 基金项目： | 额济纳绿洲生态环境综合治理试验示范(KZCX1 09 03)，黑河流域主要水文过程与生态需水规律研究(G199904350601)，黑河流域晚更新世以来水环境演变研究(KZCX1 09 05) |
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| 摘 要： | 利用波文比能量平衡法对额济纳绿洲柽柳群落蒸散进行研究,发现柽柳蒸散速率日变化成双峰形,各月出现峰值和低谷值的时间各不相同,8月最迟;平均蒸散速率值8月>7月>6月>9月;各月蒸散总量大小依次为126 9mm(8月)>93 85mm(7月)>77 3mm(6月)>65 2mm(9月)。整个生长季蒸散总量为363 35mm。蒸散速率的变化受植物自生生理特性及气候因子和下垫面条件影响,其中净辐射起主导作用;蒸散速率与地下水位变化成反相关关系,地下水位的大幅度下降可能致使柽柳死亡。
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| 关 键 词： | 额济纳绿洲 柽柳群落 蒸散 波文比 |
| 文章编号： | 1000-694(2004)04-0479-05 |
| 修稿时间： | 2003年8月5日 |
Preliminary Analysis on Evapotranspiration of Tamarix Community in Ejin Oasis |
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| ZHOU Mao-xian,XIAO Hong-lang,ZHANG Xiao-you,GONG Jia-dong.Preliminary Analysis on Evapotranspiration of Tamarix Community in Ejin Oasis[J].Journal of Desert Research,2004,24(4):479-483. |
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| Authors: | ZHOU Mao-xian XIAO Hong-lang ZHANG Xiao-you GONG Jia-dong |
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| Abstract: | The Bowen ratio method is used to study the characters of Tamarix community evapotranspiration in Ejin oasis. It is found that its diurnal variation shows two peaks, but the time of peak value and valley value appearing is not still, they appear most early in August of the whole growing season. The average evapotranspiration rate of Tamarix community follow the order: August>July>June>September; correspondingly, the total evapotranspiration are 126\^9 mm(in August), 93.85 mm(in July), 77\^3 mm(in June) and 65\^2 mm(in September). In the whole growing season the total evapotranspiration of Tamarix community is 363\^35 mm. Factors such as plant physiology, climate and underlying surface characters all influence the evapotranspiration rate of Tamarix community, among which the net radiation factor is dominant. The variation of evapotranspiration rate has negative relation with water table change, and if the water table lowers greatly Tamarix will die from moisture shortage. |
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| Keywords: | Ejin oasis Tamarix community evapotranspiration Bowen ratio |
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