Water Use Strategies of Populus euphratica and Tamarix ramosissima at Different Ages in Tarim River Basin

WANG Yong1; 2; ZHAO Chengyi1; WANG Dandan1; 2; FU Sihua1; 2; ZHOU Tianhe3

doi:10.13870/j.cnki.stbcxb.2017.06.026

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Water Use Strategies of Populus euphratica and Tamarix ramosissima at Different Ages in Tarim River Basin

更新时间：2025-03-12

- Water Use Strategies of Populus euphratica and Tamarix ramosissima at Different Ages in Tarim River Basin
- Vol. 31, Issue 6, Pages: 157-163(2017)
- 作者机构：
  
  1. 中国科学院新疆生态与地理研究所绿洲生态与荒漠环境重点实验室,乌鲁木齐,830011
  2. 中国科学院大学,北京,100049
  3. 赣州水务集团有限责任公司,江西,赣州,341000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.06.026
  CLC： Q945.17;S152.7
- Published：2017
- 稿件说明：
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WANG Yong1, 2, ZHAO Chengyi1, et al. Water Use Strategies of Populus euphratica and Tamarix ramosissima at Different Ages in Tarim River Basin[J]. 2017, 31(6): 157-163.
DOI：

WANG Yong1, 2, ZHAO Chengyi1, et al. Water Use Strategies of Populus euphratica and Tamarix ramosissima at Different Ages in Tarim River Basin[J]. 2017, 31(6): 157-163. DOI： 10.13870/j.cnki.stbcxb.2017.06.026.

摘要

基于稳定同位素方法研究了塔里木河流域胡杨和柽柳的水分来源及分布特征，探讨了塔里木河流域胡杨和柽柳的水分利用策略。结果表明：（1）胡杨和柽柳的植物水与土壤水的降水偏离程度与地下水存在显著差异（P＜0.05），表明土壤中存在不完全混合的水源库，与植物耗水和地下水补给存在动态联系；（2）不同林龄胡杨和柽柳土壤水中δ18O值随土壤深度增加均呈下降趋势，受蒸发作用影响，表层土壤水δ18O值波动明显；（3）不同林龄胡杨和柽柳水分利用来源存在差异，胡杨和柽柳对土壤水的吸收利用随林龄增加层位下移。无论在幼苗阶段或成熟阶段，柽柳利用土壤水的深度均低于胡杨，表明其适应干旱环境的能力更强。

Abstract

Based on the stable isotope method

The water use patterns and strategies of Populus euphratica and Tamarix ramosissima at different ages were studied in Tarim River Basin. The results showed that: (1) precipitation offset of plant and soil water were significantly different from the offsets of groundwater

indicating that there were two?inhomogeneous and incompletely mixed water reservoirs that supply either for the plant water fluxes or the fluxes of groundwater. (2) The δ18O value of surface soil water fluctuated widely

which was affected by evaporation

and the δ18O value of soil water decreased gradually with the increasing soil depth. (3) The water used by the Populus euphratica and Tamarix ramosissima with different ages came from different sources. The deeper soil water could be accessed after the ages increased. There might be water competition at the mature age of Populus euphratica and seedling age of Tamarix ramosissima. Whether seedling or mature

Tamarix ramosissima could use deeper water than Populus euphratica

and therefore

be more adaptable to the arid environment.

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