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生态学杂志 ›› 2009, Vol. 28 ›› Issue (08): 1655-1663.

• 研究报告 • 上一篇    下一篇

陆生植物水分利用效率

李机密1,2;黄儒珠1;王健2,3;郑怀舟2,3;黄玮1, 2   

  1. 1福建师范大学生命科学学院;2福建省亚热带资源与环境重点实验室;3福建师范大学地理科学学院
  • 出版日期:2009-08-10 发布日期:2009-08-10

Water use efficiency of terrestrial plants: A review.

LI Jimi1,2;HUANG Ruzhu1;WANG Jian2,3;ZHENG Huaizhou2,3;HUANG Wei1,2   

  1. 1College of Life Sciences, Fujian Normal University;2Fujian Province Key Laboratory of Subtropical Resources and Environment;3School of Geographical Sciences, Fujian Normal University
  • Online:2009-08-10 Published:2009-08-10

摘要: 植物水分利用效率(water use efficiency,WUE)作为叶片光合与水分生理过程的耦合因子,不仅是联系植被生态系统碳循环与水循环的重要变量,同时亦已成为揭示陆地植被生态系统对全球变化响应和适应对策的重要手段。稳定同位素技术和涡度相关技术的发展和应用,使植物WUE的概念和测定方法不断得到扩展,研究内容、尺度也不断拓宽。深入认识植物WUE的变化特征及其调控机制,一方面有助于揭示不同植物对生境的生理生态适应机理,另一方面能够促进对陆地生态系统碳水平衡关系的理解。目前生态系统水平WUE的研究尚处初始阶段。如何建立不同尺度水平WUE间的联系机制,将成为今后该研究领域的关注点。本文在阐述植物WUE概念和测定方法的基础上,综述了植物叶片水平WUE的影响因子、种间差异与水分利用策略,以及WUE与其他叶性状的关系,介绍了当前生态系统水平WUE的研究状况,提出未来的研究趋势。

关键词: 冗余, 冗余度, 最佳生长冗余度, 农业生态系统管理

Abstract: Plant water use efficiency (WUE) is a key eco-physiological index reflecting the coupling relationship between carbon and water cycles of vegetation ecosystems. In the meanwhile, the variability of WUE can reflect the responses of terrestrial plants to global change. With the development and application of stable isotope technique and eddy covariance technology, the concepts and measurement methods of WUE are improved, and the research scales about WUE are extended. To further understand the variation characteristics and regulation mechanisms of WUE would help to reveal the plant eco-physiological adaptation mechanism in different habitats, and promote the understanding of the coupling relationship between the carbon and water cycles of terrestrial ecosystems. At present, the research on ecosystem WUE is still in its initial stage, and how to correlate the WUE on different scale levels will be an important research field in the future. In this paper, the affecting factors of leaf WUE, the interspecific differences in plant WUE, the relationships between WUE and leaf characters, and the research progress on WUE at ecosystem scale are reviewed, and the future research aspects are proposed.

Key words: Redundancy, Redundancy degree, Optimal growth redundancy degree, Agro-ecosystems management