Analyze on Water Use Process of Constructive Plants in Desert Riparian Forest in the Lower Reaches of Inland River

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  • (State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China)

Received date: 2017-08-29

  Revised date: 2017-10-24

  Online published: 2018-02-06

Abstract

Desert riparian forest is an important component of the ecosystem in arid areas. The study on the water use process of constructive plants of desert riparian forest is of great significance to formulate countermeasures for ecological conservation restoration in arid area. Taking two rivers in the arid regions of northwestern China, the lower reaches of Tarim and Heihe River as the research target regions, In this study, the plant water resources and root hydraulic lift process of desert riparian forest plants were explored, and the water use processes of Populus euphratica and Tamarix ramosissima grown under drought stress conditions were analyzed. The results indicate that water use pattern and survival strategy of desert riparian forest plants is various under different groundwater depths and drought stress conditions in the lower reaches of Tarim and Heihe Rivers. In plant water acquire, Populus euphratica and Tamarix ramosissima mainly use deep subsoil water and groundwater, but their water absorption is more diversified in the lower reaches of the Tarim River than in the lower reaches of the Heihe River; In water distribution, Populus euphratica grown in the lower reaches of the Tarim River generally has a more strong hydraulic lift capacity and significant ecological effect on water redistribution. The essential reason for differences in plants water using strategy is groundwater depth, the deeper the groundwater tables (within 7 m), Populus euphratica suffered the greater the drought stress, and the hydraulic lift capacity of Populus euphratica root system is also stronger. The ecology in the lower reaches of the Heihe River has been in balance in the maintenance and development stage, while desert riparian forest plants in the lower reaches of the Tarim River are still in severe drought stress.

Cite this article

CHEN Ya-Ning, LI Wei-Hong, CHEN Ya-Peng, ZHOU Hong-Hua, HAO Xing-Ming, ZHU Cheng-Gang . Analyze on Water Use Process of Constructive Plants in Desert Riparian Forest in the Lower Reaches of Inland River[J]. Arid Zone Research, 2018 , 35(01) : 130 -136 . DOI: 10.13866/j.azr.2018.01.16

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