Intraspecific Allometric Relationships Of Leaf Traits Of Acer Mono In Donglingshan Of Beijing

Plant allometric relationships and their changes contributed to understand the adaptive response of the plant. Allometric research had focused on large-scale interspecific level. Allometric research among different life history stages of leaf traits was relatively rare. As the main companion species, A. mono had important theoretical research value. In this paper, leaf traits of A. mono adults, saplings and seedlings in3different forest types, Betula platyphylla forest、Juglans mandshurica forest and Quercus wutaishanica forest, were measured in Donglingshan of Beijing. Allometric relationships between12leaf traits were concerned. They included lamina area, lamina mass, lamina volume, lamina water content, chlorophyll, lamina nitrogen/phosphorus content on a mass basis, lamina nitrogen/phosphorus content on a area basis, petiole mass, petiole water content, Petiole length. Mainly wanting to address the following issues:the quantitative relationship of scaling exponent each leaf traits relationship; changes of allometric relationships among leaf traits in different life history stages of A. mono reflected which resource use patterns changed; whether allometric relationships of leaf traits in different forest types was different. It reflected which degree of plasticity. The conclutions is following:1、The scaling exponent of lamina mass to other leaf traits was integer multiple of1/4, but the scaling exponent would decreases with the growing of the individual.2、The scaling exponent between non-lamina mass was not integer multiple of1/4, but the scaling exponent among different life history stages was different to a certain extent.3、There was no significant correlation between lamina nitrogen content on a mass basis and lamina phosphorus content on a mass basis. The scaling exponent between lamina nitrogen content on an area basis and lamina phosphorus content on an area basis was0.86, and the allometric relationships between nitrogen content and phosphorus content among different life history stages had not significant difference.4> Principal component analysis showed that:LM, LA, LV, LWC, PM. PWC on behalf of the leaf morphology and structure information traits could explain53.5%of leaf traits, leaf nitrogen and phosphorus could explain17.4%, petiole length could explain10.8%.5、Narea-Parea allometric growth index of LA-LM, LV-LM, LWC-LM, LWC-LA, LWC-LV on different life history stages were not significantly different in the different forest types, which was that leaf investment strategy is not different among forest types.6、Allometric relationships were not significantly different in LA-LM of adults stage、LWC-LV、 Narea-Parea of adults and saplings in different environmental conditions.7、Allometric growth index of LA-PM, LV-PM, LWC-PM, PWC-PM of A. mono in J. mandshurica and Q. wutaishanica forest was significantly greater than that in white birch forest, which was that dry weight of A. mono in J. mandshurica, Q. wutaishanica forest and B. platyphylla forest has significant difference on investment strategy.8、Allometric relationships were not significantly different in LM-PM, LA-PM. LWC-PWC of adults stage. J. mandshurica forest and B. platyphylla forest had greater intercept than Q. wutaishanica forest in LV-PM, LWC-PM, PWC-PM.