我国温带山地森林48种常见树种叶片重量-出叶强度的关系  

Relationship Between Leaf Mass and Leafing Intensity for 48 Tree Species in the Temperate Mountain Forests in China

作　　者：刘长柱[1,2] 郭强[3] 池秀莲[3] 

机构地区：[1]中国科学院植物研究所,北京100093 [2]中国科学院大学生命科学学院,北京100049 [3]北京大学城市与环境学院生态学系,北京100871

出　　处：《植物学报》2015年第2期234-240,共7页Chinese Bulletin of Botany

基　　金：国家自然科学基金委创新群体项目(No.31321061);基础性工作专项(No.2011FY110300)

摘　　要：叶片是植物的主要光合器官,其质量与数量的权衡关系体现植物对环境的适应策略。在全球气候变化的背景下,研究叶片质量与数量关系有助于理解植物对环境变化的响应趋势。该研究应用标准化主轴回归方法,探讨了我国温带山地森林中48个常见树种的单叶干重与出叶强度的权衡关系。结果表明,所有物种以及落叶阔叶林、常绿和落叶阔叶树种、单叶以及亚冠层阔叶树种的单叶干重与出叶强度表现为异速生长关系;针叶林、针阔混交林、常绿及落叶针叶树种、复叶以及冠层阔叶树种则表现为等速生长关系。研究结果表明,叶大小和出叶强度并无恒定的权衡关系。Leaves are the main photosynthetic organs of plant. The trade-off between leaf mass and leafing intensity reflects an important adaptive strategy of the plant to the environment. Studies of the mechanisms of such a trade-off under global climate-change scenarios will help in better understanding the responses of plants to environmental fluctua- tions. In this study, we used the standardized major axis estimation method to examine the relationship between leaf mass and leafing intensity within current-year twigs from 48 tree species sampled from 4 mountains in temperate regions of China. The trade-off between leaf mass and leafing intensity was allometric for all twigs and those from a deciduous broadleaf forest, simple broadleaf species and understorey broadleaf species but isometric for twigs from coniferous and mixed coniferous broadleaf forests, evergreen and deciduous broadleaf species, compound broadleaf species and can- opy broadleaf species. Thus, the trade-off between leaf size and leafing intensity is not ubiquitous for species of different leaf forms and life forms, canopy status, or species from different forest types.

关 键 词：叶干重 出叶强度 权衡关系 生活型 叶型 

分 类 号：S718.5[农业科学—林学]