塔里木河下游干旱胁迫下多枝柽柳茎水势的变化

生态学杂志

塔里木河下游干旱胁迫下多枝柽柳茎水势的变化

付爱红^1,2,3;陈亚宁^1,2;陈亚鹏^1,2

¹中国科学院新疆生态与地理研究所，乌鲁木齐 830011；²中国科学院绿洲生态与荒漠环境重点实验室，乌鲁木齐 830011；³中国科学院研究生院，北京 100039

收稿日期:2007-05-27 修回日期:1900-01-01 出版日期:2008-04-10 发布日期:2008-04-10

Changes of stem water potential of Tamarix ramosissima under drought stress in ower reaches of Tarim River.

FU Ai-hong^1,2,3;CHEN Ya-ning^1,2;CHEN Ya-peng^1,2

¹Xinjiang Institute of Ecology and Geography, Chinese Academy of Scienc
es, Urumq 830011, China;²Key Laboratory of Oasis Ecology and Desert Envir
onment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumq 830011, China;³Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received:2007-05-27 Revised:1900-01-01 Online:2008-04-10 Published:2008-04-10

摘要/Abstract

摘要： 于2005—2006年对新疆塔里木河下游亚合浦马汗和阿拉干断面多枝柽柳(Tamarix ramosissima)茎水势进行了测定。结果表明：多枝柽柳茎水势日变化规律与其它植物水势不同，8：00较高，14:00和20:00较低，20:00以后略呈上升趋势，说明在塔里木河下游气温不是影响多枝柽柳水势变化的主导因素；对多枝柽柳茎水势和地下水埋深、土壤盐分进行相关分析表明，多枝柽柳茎水势与地下水埋深之间呈显著负相关性，与土壤盐分不具有显著相关性，说明塔里木河下游多枝柽柳茎水势对地下水埋深的变化响应强烈，对土壤盐分的变化响应不强烈。该研究可为塔里木河下游进行有效的生态输水，加速受损生态系统的恢复提供科学依据。

关键词: 生态环境需水量, 概念, 分类, 计算方法

Abstract: In 2005 and 2006, measurement was made on the stem water potential of Tamarix ramosissima at the Yahepu and Alagan sections of the lower reaches of Tarim River. The results showed that the diurnal variation of the stem water potential of T. ramosissima was different from that of other plants, being higher at 8:00 and lower at 14:00 and 20:00, or slightly increased after 20:00. This phenomenon illustrated that temperature was not a predominant factor affecting the stem water potential of T. ramosissima in the lower reaches of Tarim River. The stem water potential of T. ramosissima had significant negative correlation with the depth of groundwater but no evident correlation with soil salinity, suggesting its stronger responses to groundwater depth than to soil salinity. This study provided a scientific basis for the effective water transfer and the speedup of the restoration of damaged ecosystem in the lower reaches of Tarim River.

Key words: Ecological and environmental water requirement, Conception, Classification, Calculation method

付爱红;陈亚宁;陈亚鹏 . 塔里木河下游干旱胁迫下多枝柽柳茎水势的变化[J]. 生态学杂志.

FU Ai-hong^1,2,3;CHEN Ya-ning^1,2;CHEN Ya-peng^1,2 . Changes of stem water potential of Tamarix ramosissima under drought stress in ower reaches of Tarim River. [J]. cje.

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