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干旱区地理 ›› 2014, Vol. 37 ›› Issue (5): 988-995.

• 生物与环境 • 上一篇    下一篇

黑河下游不同林龄胡杨水分来源的D、18O同位素示踪

刘树宝1,3,陈亚宁2,李卫红2,陈亚鹏2,任志国2   

  1. 1    新疆农业大学草业与环境科学学院, 新疆    乌鲁木齐    830052;    2    中国科学院新疆生态与地理研究所,
    荒漠与绿洲生态国家重点实验室, 新疆    乌鲁木齐    830011;    3    新疆环境保护科学研究院, 新疆    乌鲁木齐    830011
  • 收稿日期:2013-07-11 修回日期:2013-09-19 出版日期:2014-09-25
  • 通讯作者: 陈亚宁,研究员,博导,从事干旱区水资源与地表过程研究. Email:chenyn@ms.xjb.ac.cn
  • 作者简介:刘树宝(1987-),男,甘肃靖远人,硕士研究生,从事生态学、资源开发与环境整治等方面的研究. Email:lsb082413@163.com
  • 基金资助:

    国家自然科学基金项目(Grant No.91025025);国家自然科学基金(No.41101102);国家自然科学基金(No.41101533)资助

Application of D and 18O stable isotopes in analyzing the water sources of different ages of Populus euphratica in the lower reaches of the Hei River

LIU  Shu-bao1,3,CHEN  Ya-ning2,LI  Wei-hong2,CHEN  Ya-peng2,REN  Zhi-guo2   

  1. 1   College of Pratacultural and Environmental Science Xinjiang Agricultural University, Urumqi  830052, Xinjiang, China;   2   State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi  830011, Xinjiang, China;3   Xinjiang Academy of Environmental Protection Science Research, Urumqi  830011, Xinjiang, China
  • Received:2013-07-11 Revised:2013-09-19 Online:2014-09-25

摘要: 对黑河下游不同林龄胡杨木质部水及其不同潜在水源稳定同位素组成(δD、δ18O)的测定分析,探讨不同潜在水源对胡杨的贡献。结果表明:(1)不同林龄胡杨木质部δ18O差异显著,胡杨幼苗、成熟木、过熟木的δ18O值分别为-5.368 14‰、-6.032 75‰和-6.924 18‰;(2)不同林龄胡杨所利用的水分来源不同,胡杨幼苗主要利用30~50 cm的土壤水,利用率在70%左右,对地下水的利用仅为6%;成熟木主要利用200~220 cm的土壤水及地下水,对地下水的利用最多达85%;胡杨过熟木主要利用100~260 cm的土壤水及地下水,深度范围较幼苗和成熟木都广,对地下水的利用较高,最多达96%,胡杨成熟木和过熟木主要利用的是地下水。

关键词: 水分来源, 不同林龄胡杨, 氢、氧同位素, 黑河

Abstract: Research on the water sources of different ages of Populus euphratica plays a key role in formulating the conservation strategy of Populus euphratica. This study discusses the contributions of different potential water sou- rces to Populus euphratica,based on the composition of the stable oxygen and hydrogen isotope (δ18O,δD) of the xylem in different ages of Populus euphratica and different potential water sources in the lower reaches of the Hei River. The results showed as follows:(1)there were significant differences of δ18O value in the xylem of different ages of Populus euphratica. The δ18O values of the seedlings,mature wood and over-mature wood of Populus euphratica reached -5.368‰,-6.033‰ and -6.924‰,respectively.(2)The water utilization of different ages of Populus euphratica came from different sources. The seedlings of [Populus euphratica] mainly used the soil water in 30-50 cm layers,with the utilization rate of 70%,while the utilization rate of groundwater only about 6%. The mature wood of Populus euphratica mainly used the soil water in 200-320 cm layers and the groundwater,with the largest utilization rate at 85% of the groundwater. The over-mature wood of [Populus euphratica] mainly used the soil water in 100-260 cm layers and also the groundwater,with the higher utilization rate (about 96%) of the groundwater. And the depth range of the over-mature wood is wider than that of seedlings and mature wood of Populus euphratica.

Key words: water sources, different ages of Populus euphratica, D and 18O stable isotopes, the Hei River

中图分类号: 

  • S152.7