Taking ten common broad-leaved trees species as the research object,applying DUALEX plant polyphenol-chlorophyll meter to measure chlorophyll contents and plant polyphenols of different tree species.The chlorophyll contents and plant polyphenols of new and old leaves of different tree species were compared in different species,the effects of leaf age and orientation on chlorophyll content and plant poly-phenols of different tree species were analyzed.The results showed that the leaf orientation had not significantly affected on chlorophyll contents and plant polyphenols among different species(P>0.05),however,the leaf age had significantly affected on chlorophyll contents and plant polyphenols among different species(P<0.05).It was proved that the difference in the contents of chlorophyll and polyphenols among tree species was not caused by the difference in leaf orientation,but was significantly related to the leaf age of tree species.Meanwhile,the differ-ence in the chlorophyll contents and polyphenols among tree species was also related to the difference among tree species.This provides an im-portant basis for selection of broad-leaved trees in Southwest of Kunming.
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万方数据