[A preliminary study on the effect of irrigation on water physiology of Tamarix ramosissima in Cele oasis].
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 (-1.69 MPa). Irrigation had no influence on the increase of water potential. The transpiration rate (0.505 mmol.m-2.s-1) after irrigation was higher than that before irrigation(0.18 mmol.m-2.s-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.
Zeng
Fanjiang
F
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011.
Foetzki
Andrea
A
Li
Xiangyi
X
Zhang
Ximing
X
Li
Xiaoming
X
Runge
Michael
M
D000383:Agriculture / Q000379:methods; D002681:China; D002980:Climate; D032363:Tamaricaceae / Q000378:metabolism* / Q000502:physiology; D014867:Water / Q000378:metabolism*
D014867:Water