[Objective]The differences of photosynthetic pigments and photosynthetic characteristics of Paulownia fortunei in 4 kinds of Guangxi areas were compared with Henan provenance. [Method]The content of chlorophyll in different provenances was determined by ethanol-acetone extraction. The photosynthetic characteristics of P. fortunei in different sources were measured by LI-6400 photosynthetic apparatus. [Result] There were significant differences( P < 0. 05) in the ratio of chlorophyll a to chlorophyll b( Chla...