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中文摘要：
从植物形态结构-功能-植物功能群的角度，采用PCA分析、RDA排序和聚类分析法分析了植物叶片形态特征与持水能力的关系，划分了叶片持水功能群。结果表明：决定植物叶片持水能力的主要形态指标为叶片大小、叶片宽窄、叶片粗糙度，据此，评价了贵州茅台水源功能区植物群落中31个主要树种的叶片持水能力，并划分为6个叶片持水功能群：大叶窄叶中粗糙度高持水功能群（PFGsI）、中叶窄叶高粗糙度高持水功能群（PFGsⅡ）、中叶宽叶高粗糙度中持水功能群（PFGsⅢ）、小叶窄叶低粗糙度中持水功能群（PFGsIV）、中叶宽叶低粗糙度中持水功能群（PFGsV）、中叶常叶低粗糙度低持水功能群（PFGsVI），并描述了各叶片持水功能群的基本特征。
英文摘要：
The ＇plant leaf water-holding functional groups were classified using principal component analysis, redundancy ordination analysis and hierarchical cluster analysis from the point of plant modality structure-function- plant functional groups. The results showed that, there were three factors, which determined the function of water-holding capacity, i.e. leaf size, leaf L/W and leaf roughness, then thirty one species were classified into six plant leaf water-holding functional groups based on the appraisement of water-holding capacity of the species in Moutai water functional district. The six plant functional groups were as follows： large leaf narrow leaf medium roughness high water holdup PFGs I , medium leaf narrow leaf high roughness high water holdup PFGs II , medium leaf broad leaf high water holdup PFGsm, small leaf narrow leaf low roughness moderate water holdup PFGs IV, medium leaf broad leaf low roughness moderate water holdup PFGs V, medium leaf normal leaf low rough- ness low water holdup PFGsVI. In the meantime, the basic features of the six PFGs were revealed.
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