Leaf functional traits and their coupling relationships of woody plants with different life forms in the northern Dabie Mountains
[Objective]This study aim to explore the variation of leaf functional traits among different life forms of woody plants on the northern edge of the Dabie Mountains,investigate the coupling relationship between indicators of leaf functional traits,and provide a basis for deciphering the response mechanisms of plants to climate change.[Method]Leaf functional traits of 30 common woody plants with different life forms(evergreen,deciduous,arbor,shrub)in Liankangshan National Nature Reserve on the northern edge of the Dabie Mountains were collected,and eight leaf functional traits including chlorophyll content,dry/fresh ratio,nitrogen content,phosphorus content,potassium content,nitrogen/phosphorus ratio,leaf area,and specific leaf area were determined.The leaf functional traits and their correlations of different life forms of woody plants were analyzed.[Result]There were certain differences in leaf functional traits among different life forms of woody plants,among which the average chlorophyll content,nitrogen content,phosphorus content,potassium content,leaf area,and specific leaf area of evergreen and deciduous trees showed significant differences(P＜0.05).The average leaf area,nitrogen content,phosphorus content,potassium content,dry/fresh ratio,and nitrogen/phosphorus ratio of arbor and shrub showed significant differences(P＜0.05).There were certain correlations between some leaf functional traits,such as positive correlation between leaf nitrogen and phosphorus content and potassium content(P＜0.05),significant positive correlation between leaf nitrogen content and phosphorus content(P＜0.05),positive correlation between leaf area and leaf nitrogen,phosphorus,potassium content(P＜0.05),and positive correlation between specific leaf area and leaf nitrogen,phosphorus,potassium content(P＜0.05).The principal component analysis results showed that the leaf phosphorus,nitrogen,and potassium contents were important indicators of leaf functional traits,and the 30 woody plants could be classified into four functional groups based on the first and second principal components,with the contribution rates of 55.2％and 12.8％to the variation of plant leaf functional traits respectively.[Conclusion]There exists a certain pattern of variation in leaf functional trait indicators among different life forms of woody plants.Among them,leaf phosphorus,nitrogen,and potassium mass fractions are indicative indicators,and they are significantly positively correlated with leaf area.[Ch,4 fig.1 tab.28 ref.]
国家科技期刊平台
NSTL
万方数据
