策勒绿洲多枝柽柳灌溉前后水分生理指标变化的初步研究

应用生态学报 ›› 2002, Vol. ›› Issue (7): 849-853.

策勒绿洲多枝柽柳灌溉前后水分生理指标变化的初步研究

曾凡江^1,2, Andrea Foetzki³, 张希明¹, 李小明¹, Michael Runge¹

1. 中国科学院新疆生态与地理研究所, 乌鲁木齐 830011;
2. 中国科学院沈阳应用生态研究所, 沈阳 110016;
3. 德国哥廷根大学生态与生态系统研究所, 哥廷根 37073

收稿日期:2001-08-27 修回日期:2002-02-04
通讯作者: 曾凡江,男,1966年生,中国科学院沈阳应用生态研究所博士研究生,主要从事荒漠植物生态学方面的研究,现已发表论文多篇.
基金资助:
中国欧盟政府间科技合作项目(INCODC972774);国家重点基础研究发展规划项目(GI19904350504);中国科学院新疆生态与地理研究所创新项目(9801080010401);中国科学院“西部之光”资助项目.

A preliminary study on the effect of irrigation on water physiology of Tamarix ramosissima in Cele oasis

ZENG Fanjiang^1,2, Andrea Foetzki³, LI Xiangyi¹, ZHANG Ximing¹, LI Xiaoming¹

1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011;
2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016;
3. Institute of Ecology and Ecosystem, Goettingen University, 37073 Goettingen, Germany

Received:2001-08-27 Revised:2002-02-04

摘要/Abstract

摘要： 在位于塔克拉玛干沙漠南缘的策勒绿洲对引洪灌溉后多枝柽柳清晨叶水势、水势日变化和蒸腾速率的变化特点进行了研究.结果表明,灌溉后柽柳的清晨水势值(-0.93MPa)比灌溉前的清晨水势值(-1.04MPa)有所增加,但幅度不大.因此,灌溉对柽柳清晨水势的恢复有一定的作用.灌溉后柽柳水势的日变化均值(-2.29MPa)比灌溉前的水势日变化均值(-1.69MPa)有较大降低.灌溉后柽柳蒸腾速率的日变化值(0.505mmol·m^-2s^-1)比灌溉前的蒸腾速率日变化值(0.18mmol·m^-2s^-1)有较大增加.从灌溉前后样地土壤含水量的变化和柽柳的根系分布情况看,这是柽柳利用地下水的结果.柽柳通过深根系和地下水相接,地表灌溉对柽柳水分状况改变的作用不明显.

关键词: 策勒绿洲, 多枝柽柳, 水分生理, 灌溉, Biolog微平板法, 主成分分析, 微生物群落多样性, 土地利用模式

Abstract: Change characteristics of predawn water potential, water potential daily process, and transpiration rate of Tamarix ramosissima before and after irrigation was studied in Cele oasis in the south fringe of Takelamakan Desert. The results showed that the predawn water potential (-0.93 MPa) after irrigation was higher than that before irrigation (-1.04 MPa), but there was no obvious difference. So, irrigation had certain influences on the recovery of predawn water potential of T. ramosissima. The average value of water potential daily process (-2.29 MPa) after irrigation was lower than that before irrigation (-1.69MPa). Irrigation had no influence on the increase of water potential. The transpiration rate (0.505 mmol穖^-2穝^-1) after irrigation was higher than that before irrigation (0.18mmol穖^-2 穝^-1), and compared to the soil water content and the distribution of root system before and after irrigation, it might be resulted in underground water utilization of T. ramosissima. T. ramosissima could use the underground water with its deep root system. Surface irrigation had no significant effect on the change of water condition of T. ramosissima.

Key words: Cele oasis, Tamarix ramosissima, Water physiology, Irrigation, land use pattern, microbial community diversity, principal component analysis, Biolog microplate

中图分类号:

S727.23

曾凡江, Andrea Foetzki, 张希明, 李小明, Michael Runge. 策勒绿洲多枝柽柳灌溉前后水分生理指标变化的初步研究[J]. 应用生态学报, 2002, (7): 849-853.

ZENG Fanjiang, Andrea Foetzki, LI Xiangyi, ZHANG Ximing, LI Xiaoming, Michael Runge . A preliminary study on the effect of irrigation on water physiology of Tamarix ramosissima in Cele oasis[J]. Chinese Journal of Applied Ecology, 2002, (7): 849-853.

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