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

Abstract

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

CLC Number:

S727.23

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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