植物生态学报 ›› 2010, Vol. 34 ›› Issue (2): 151-159.DOI: 10.3773/j.issn.1005-264x.2010.02.006

所属专题: 稳定同位素生态学

• 稳定同位素生态学专题论文 • 上一篇    下一篇

不同生活型绿化植物叶片碳同位素组成的季节特征

王玉涛1,3, 李吉跃2,3,*(), 刘平1, 陈崇3, 何春霞3   

  1. 1沈阳农业大学林学院, 沈阳 110161
    2华南农业大学林学院, 广州 510642
    3北京林业大学省部共建森林培育与保护教育部重点实验室, 北京 100083
  • 收稿日期:2009-05-21 接受日期:2009-08-03 出版日期:2010-05-21 发布日期:2010-02-01
  • 通讯作者: 李吉跃
  • 作者简介:* E-mail: ljyymy@vip.sina.com

Seasonal differences in leaf carbon isotope composition among landscaping species of different life forms in Beijing, China

WANG Yu-Tao1,3, LI Ji-Yue2,3,*(), LIU Ping1, CHEN Chong3, HE Chun-Xia3   

  1. 1College of Forestry, Shenyang Agricultural University, Shenyang 110161, China
    2College of Forestry, South China Agricultural University, Guangzhou 510642, China
    3Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China
  • Received:2009-05-21 Accepted:2009-08-03 Online:2010-05-21 Published:2010-02-01
  • Contact: LI Ji-Yue

摘要:

通过测定北京地区不同生活型绿化植物叶片的碳同位素组成(δ13C值), 从植物种和生活型两个方面研究植物水分利用效率的自然可变性。结果表明: 所测定的75种植物(隶属于35科65属)的叶片的δ13C值变幅, 春季为-30.7‰ - -23.4‰, 夏季为-31.5‰ - -25.1‰, 秋季为-31.4‰ - -23.9‰; 落叶灌木种间差异不显著(p = 0.114), 而常绿乔木(p = 0.005)、落叶乔木(p < 0.001)、常绿灌木(p = 0.022)、草本植物(p < 0.001)和藤本植物(p = 0.001)的种间差异显著或极显著; 同一生活型植物叶片的δ13C季节差异显著, 春季叶片的δ13C值显著大于夏秋两季(常绿乔木除外), 不同生活型植物叶片的δ13C值在春、夏、秋3个季节差异都达到了极显著水平(春季p = 0.001、夏季p < 0.001、秋季p < 0.001), 且叶片的δ13C值表现出乔木树种>灌木树种>藤本植物>草本植物、常绿植物>落叶植物的规律。因此, 植物种和生活型均会引起植物叶片δ13C值的变化, 但δ13C受生活型变化的影响较大, 表明不同生活型植物的水分利用效率具有明显差异。

关键词: 碳同位素组成, 绿化植物, 生活型, 季节特征, 水分利用高效率

Abstract:

Aims Plants with high water use efficiency could contribute to an overall lower water-using landscape. Our objective was to analyze differences in water use efficiency among landscaping plants in Beijing, China.

Methods We used stable carbon isotope techniques to investigate δ13C values of 75 species belonging to 35 families and 65 genera in spring, summer and autumn in 2006 and analyzed variations in water use efficiency of different plant species and different life forms (evergreen tree, deciduous tree, evergreen shrub, deciduous shrub, forb and liana).

Important findings Leaf δ13C values varied between -30.7‰ and -23.4‰ in spring, -31.5‰ and -25.1‰ in summer and -31.4‰ and -23.9‰ in autumn. Differences of δ13C values were not significant in deciduous shrub species (p = 0.114), but were significant in evergreen trees (p = 0.005), deciduous trees (p < 0.001), evergreen shrubs (p = 0.022), forbs (p < 0.001) and lianas (p = 0.001). Leaf δ13C values were significantly different among seasons, being greater in spring than in summer and autumn (except for evergreen trees). The δ13C values for life forms were significantly different in different seasons, with a sequence of trees>shrubs>lianas>forbs, and evergreen plants>deciduous plants. Results showed that variation of leaf δ13C is dependent on species and life form, especially life form, and that water use efficiency differed greatly among life forms.

Key words: carbon isotope composition, landscape plants, life form, seasonal characteristic, water use efficiency