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Chinese Journal of Applied Ecology ›› 2020, Vol. 31 ›› Issue (4): 1083-1087.doi: 10.13287/j.1001-9332.202004.004

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Response of foliar δ13C in Populus euphratica and Tamarix sp. to different groundwater depths in the oasis of desert hinterland

MARHABA·Nijat1,2, DAI Yue1,2,3*, SHI Qing-dong1,2, LI Tao1,2, XIAO HELAITI·Bayi1,2, ANWAIER·Abudureyimu1,2   

  1. 1College of Resource and Environmental Sciences, Xinjiang University, Urumqi 830046, China;
    2Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi 830046, China;
    3Institute of Arid Ecology and Environment, Xinjiang University, Urumqi 830046, China.
  • Received:2019-11-20 Online:2020-04-20 Published:2020-04-20
  • Contact: *E-mail: happydaiyue@163.com
  • Supported by:

    This work was supported by the Youth Fund Project of National Natural Science Foundation of China (31800613) and the Key Project of Joint Xinjiang and National Natural Science Foundation of China (U1703237).

Abstract: Water use efficiency of plants in arid regions plays a key role in affecting the distribution and water use of plants. We analyzed the responses of water use efficiency of Populus euphratica and Tamarix sp. to different groundwater depths by measuring foliar δ13C of the two dominant species in a desert hinterland. The results showed that as the groundwater depth increased from 2.1 m to 4.3 m, foliar δ13C of Tamarix sp. increased slightly and remained relatively stable. Tamarix sp. had a more stable water use efficiency to adapt to the arid environment. Foliar δ13C of P. euphratica first slightly decreased and then increased. P. euphratica improved its water use efficiency to adapt to drought stress. At the same groundwater depth, foliar δ13C of Tamarix sp. was higher than that of P. euphratica, indicating that water use efficiency of Tamarix sp. was higher than that of P. euphratica.

Key words: water use efficiency, hinterland of the desert, groundwater depth, δ13C