地球科学进展 ›› 2008, Vol. 23 ›› Issue (7): 698 -706. doi: 10.11867/j.issn.1001-8166.2008.07.0698

流域水循环的生物学研究 上一篇    下一篇

干旱区根土界面水分再分配及其生态水文效应研究进展与展望
李锋瑞,刘继亮   
  1. 中国科学院寒区旱区环境与工程研究所黑河生态水文与流域集成管理研究实验室,临泽内陆河流域研究站,甘肃 兰州 730000
  • 收稿日期:2008-04-15 修回日期:2008-06-17 出版日期:2008-07-10
  • 通讯作者: 李锋瑞 E-mail:lfengrui@vip.163.com
  • 基金资助:

    国家自然科学基金项目“差巴嘎蒿对水环境变化的可塑性反应及其适应机理”(编号:40771068);中国科学院创新团队国际合作伙伴计划项目“干旱区内陆河流域水问题基础研究”(编号:CXTD-Z2005-2-4)资助.

Hydraulic Redistribution and Its Eco-hydrological Effects in Root-soil Interfacial Systems in Arid Regions

Li Fengrui,Liu Jiliang   

  1. Heihe Laboratory of Ecohydrology and Integrated Basin Management, Linze Inland River Basin Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China  
  • Received:2008-04-15 Revised:2008-06-17 Online:2008-07-10 Published:2008-07-10
水分限制环境下,植物对生境的适应直接或间接地与植物对水分资源的利用有关。目前已知,根系—土壤系统(又称根土界面)水分再分配是陆地表层系统地下生态过程的一个重要环节,它在植物对土壤水分的利用和生态系统水分循环过程中起着关键调节作用,而且对生态系统的碳氮磷循环与养分平衡等关键过程亦具有重要影响。因此,深入开展水分限制环境下根土界面水分再分配过程及其生态水文效应的研究有重要的科学意义。围绕“水分限制环境下根土界面水分再分配过程及其效应”这一核心问题,重点从根系生态学、根土界面水分再分配发生机理及其生态水文效应及影响根土界面水分再分配发生的主要因子等3个方面对国内外的研究动态及最新研究进展作比较系统的评述;在此基础上,提出了根土界面水分再分配过程及其生态水文效应研究中应重点关注和研究的几个前沿科学问题。
It is increasingly recognized that hydraulic redistribution process in roo-soil interfacial systems is an important component of belowground eco-processes in water-limited arid and semiarid ecosystems. The hydraulic redistribution has been known to play a potential role in regulating soil water distribution and ecosystem water cycling, influencing ecosystem carbon,nitrogen and phosphorus cycling and nutrient equilibrium. Therefore, further integrated experimental researches are crucial for improving our understanding of the eco-hydrological effects of hydraulic redistribution process in root-soil interfacial systems in water-limited ecosystems. This paper gives an overview of advances in the study of hydraulic redistribution and its potential ecophysiological implications performed over the last 30 years at home and abroad, and provides a list of the potential questions that remain largely unknown and are required to pay much more attention in this regard.

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