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

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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

Abstract

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

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

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